Abstract:
A gaming system is provided with a monitor for displaying and outputting a gaming screen, a touch panel superposed upon the monitor, and an external storage device for storing sequence data in which an operational period of the touch panel has been described. In addition, the gaming system displays upon the monitor a gaming area whereupon two reference units disposed apart from each other and a specific reference unit disposed in the vicinity of the reference units are set. Also, an object for instructing operations for each of the reference units is displayed while being caused to move within the gaming area, and in the case of a mis-operation of a specific object heading toward the specific reference unit, the specific object is destroyed, and the path which had been set as the object appearance area is used as the path of movement for the next object.

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     This application is a national stage application of PCT/JP2011/063409, filed Jun. 10, 2011, which claims priority to Japanese Patent Application No. 2010-133437, filed Jun. 10, 2010, the disclosures of which are hereby incorporated by reference in their entirety. 
     TECHNICAL FIELD 
     The present invention relates to a game system in which an operation timing of an operating unit provided in an input device is indicated through a game screen, a control method, and a storage medium storing a computer program used thereof. 
     BACKGROUND ART 
     There are game machines in which a plurality of players alternately operates an operating unit in tune with a rhythm of music. Of the game machines, there has been known a game machine in which a plurality of players plays a game, and each player alternately operates an operating unit while deciding a next player to operate an operating unit through an operation of an operating unit (for example, see Patent Literature 1). As an example of prior art documents relevant to the present invention, in addition to the Patent Literature 1, patent Literature 2 also exists. 
     Patent Literature 1: Japanese Patent Application Laid-Open (JP-A) No. 2003-236243 and Patent Literature 2: JP-A No. 2000-155543. 
     SUMMARY OF INVENTION 
     Technical Problem 
     In the game machine disclosed in Patent Literature 1, light shots serving as operation indication marks to indicate an operation timing of an operating unit move toward a control area serving as a reference portion. Each player operates an operating unit in tune with an entry of the light shots into a control area. And, in the game machine disclosed in Patent Literature 1, a method of increasing the number of operation indication marks is used as a method of improving a difficulty level of a game. However, in this method, a difficulty level of a game of each player uniformly increases. In addition, the number of operation indication marks which can be displayed on a game screen is limited due to visibility of the operation indication mark and the like. 
     In this regard, it is an object of the present invention to provide a game system, a control method, and a storage medium storing a computer program used thereof, which are capable of changing a difficulty level of a game by changing the position of a reference portion at which an operation indication mark is to arrive. 
     Solution to Problem 
     A game system according to the present invention comprises: a display device that displays and outputs a game screen; an input device including at least one operating unit; a sequence data storage device that stores sequence data in which an operation timing of the operating unit during a game is described; a game region presenting device that causes a game region, in which a plurality of reference portions arranged apart from each other by a predetermined distance are set and at least one specific reference portion is set as a part of the plurality of reference portions at a position at which a distance between the position and other reference portions is different from the predetermined distance, to be displayed on the game screen; a mark display control device that displays an operation indication mark for indicating an operation on the operating unit while moving the operation indication mark along any one of a plurality of paths in the game region so as to arrive at at least one of the plurality of reference portions at an operation timing indicated in the sequence data; and a path control device that controls a moving path of the operation indication mark such that the moving path of the operation indication mark is limited to a predetermined path. 
     According to the present invention, there is provided the specific reference portion in which a distance between the specific reference portion and other reference portions is different from the predetermined distance between the plurality of reference portions. An operation indication mark that moves so as to arrive at the specific reference portion at an operation timing described in the sequence data may be also displayed on the game screen. For this reason, the position of the reference portion considered by the player changes between other reference portions and the specific reference portion. Thus, since the position and the point of view considered by the player can be changed, a difficulty level of a game can be changed. 
     Furthermore, since the distance between the specific reference portion and other reference portions is different from the predetermined distance between the other reference portions, the moving distance between the reference portions other than the specific reference portion is different from the moving distance between other reference portions and the specific reference portion. Thus, when the operation indication mark moves toward the specific reference portion, compared to when the operation indication mark moves toward the reference portion other than the specific reference portion, the operation indication mark is likely to move along a path in which the moving velocity, the moving path, or the like is inappropriate to an indication of an operation timing. According to the present invention, since it is possible to limit the moving path of the operation indication mark to a predetermined path, it is possible to prevent the operation indication mark from moving along the inappropriate path. 
     In an aspect of the game system according to the present invention, the path control device may control the moving path of the operation indication mark such that the operation indication mark moves along a path in which the moving velocity of the operation indication mark falls within a predetermined range as the predetermined path. In this case, it is possible to prevent the moving velocity of the operation indication mark from being inappropriate to an indication of an operation timing. Further, in this aspect, the game system may further comprises a velocity calculating device that calculates a moving velocity of the operation indication mark based on a distance from an appearance position of the operation indication mark set in the game screen to an arrival position and an operation timing indicated in the sequence data, and wherein the path control device may control the moving path of the operation indication mark such that the operation indication mark moves along a path in which the moving velocity calculated in the velocity calculating device falls within a predetermined range as the predetermined path. 
     In an aspect of the game system according to the present invention, the game region presenting device may cause a reference portion of a straight line form to be displayed as at least one of the plurality of reference portions, and the path control device may control the moving path of the operation indication mark such that the operation indication mark moves along a path in which an angle formed between a moving direction of the operation indication mark moving toward the reference portion of the straight line form and the reference portion of the straight line form falls within a predetermined range as the predetermined path. In this case, it is possible to prevent the operation indication mark from moving along a path having an angle which is inappropriate to an indication of an operation timing. 
     In an aspect of the game system according to the present invention, the path control device may control the moving path of the operation indication mark such that the moving path of the operation indication mark moving so as to arrive at the specific reference portion at the operation timing indicated in the sequence data is limited to the predetermined path. In this case, it is possible to limit the moving path of the operation indication mark moving toward the specific reference portion to an appropriate path. 
     The specific reference portion may be provided at any position as far as a distance between the specific reference portion and other reference portions is different from a predetermined distance between the other reference portions. For example, in an aspect of the game system according to the present invention, the game region presenting device may cause a game region, in which the specific reference portion is set at a position in which a distance from at least one reference portion of the plurality of reference portions is closer than a distance from reference portions other than the one reference portion, to be displayed on the game screen as the game screen. In this case, since deviation may occur in a distance between the specific reference portion and other reference portions, the deviation in the distance can be used as information representing a relation between the specific reference portion and other reference portions. Further, in this aspect, the game region presenting device may cause a game region, in which the specific reference portion is set at a position at which a distance shorter than a distance between a reference portion close to the specific reference portion and other reference portions is set from the other reference portion as the different distance, to be displayed on the game screen as the game region. 
     In an aspect of the game system according to the present invention, the mark display control device may cause an operation indication mark, which moves from the other reference portions side so as to arrive at the specific reference portion at an operation timing indicated in the sequence data, to disappear from the game screen after passing through the specific reference portion. In this case, it is possible to prevent the operation indication mark that indicates an operation timing through the specific reference portion from arriving at a near reference portion. Accordingly, the induction of erroneous operation can be suppressed. 
     Any reference portion may be applied as the specific reference portion. For example, in an aspect of the game system according to the present invention, the game region presenting device may cause a game region in which two specific reference portions are set as the specific reference portion to be displayed on the game screen as the game region. 
     The game region may have various shapes. For example, in an aspect of the game system according to the present invention, the game region presenting device may cause a region, which is formed in the form of a quadrangle and includes two reference portions extending in the form of a straight line which are set at both one ends of the quadrangle so as to face each other, to be displayed on the game screen as the game region. 
     Various input devices may be used as the input device. For example, in an aspect of the game system according to the present invention, a touch panel arranged on the display device so as to cover the game region may be used as the input device. 
     In an aspect of the game system according to the present invention, the game system may further comprise an evaluating device that evaluates an operation in at least one of the plurality of reference portions based on a timing of an operation on the operating unit and an operation timing designated by the sequence data. In this case, a timing of an operation on the operating unit can be evaluated based on an operation timing described in the sequence data. Thus, amusement of a game can be further improved. 
     In an aspect of the game system according to the present invention, the game system may further comprise: an audio output device that reproduces and outputs a sound; a music data storage device that stores music data used to reproduce music; and a music reproducing device that reproduces the music through the audio output device based on the music data, and wherein an operation timing of the operating units during reproduction of the music may be described in the sequence data. In this case, a music game in which an operation indication mark moves so as to arrive at at least one reference portion at an operation timing corresponding to a rhythm of music can be actualized. 
     A control method of the present invention is a control method of controlling a computer incorporated into a game system comprising: a display device that displays and outputs a game screen; an input device including at least one operating unit; a sequence data storage device that stores sequence data in which an operation timing of the operating unit during a game is described, and wherein the control method of controlling the computer comprises the steps: a game region presenting step that causes a game region, in which a plurality of reference portions arranged apart from each other by a predetermined distance are set and at least one specific reference portion is set as a part of the plurality of reference portions at a position at which a distance between the position and other reference portions is different from the predetermined distance, to be displayed on the game screen; a mark display control step that displays an operation indication mark for indicating an operation on the operating unit while moving the operation indication mark along any one of a plurality of paths in the game region so as to arrive at at least one of the plurality of reference portions at an operation timing indicated in the sequence data; and a path control step that controls a moving path of the operation indication mark such that the moving path of the operation indication mark is limited to a predetermined path. 
     Further, a storage medium storing a computer program for a game system of the present invention is a storage medium storing a computer program for a game system comprising: a display device that displays and outputs a game screen; an input device including at least one operating unit; a sequence data storage device that stores sequence data in which an operation timing of the operating unit during a game is described; and wherein the computer program is configured so as to cause a computer incorporated into the game system to function as: a game region presenting device that causes a game region, in which a plurality of reference portions arranged apart from each other by a predetermined distance are set and at least one specific reference portion is set as a part of the plurality of reference portions at a position at which a distance between the position and other reference portions is different from the predetermined distance, to be displayed on the game screen; a mark display control device that displays an operation indication mark for indicating an operation on the operating unit while moving the operation indication mark along any one of a plurality of paths in the game region so as to arrive at at least one of the plurality of reference portions at an operation timing indicated in the sequence data; and a path control device that controls a moving path of the operation indication mark such that the moving path of the operation indication mark is limited to a predetermined path. It is possible to actualize the game system of the present invention by executing the control method of controlling the computer and the computer program for the game system of the present invention. 
     Advantageous Effects of Invention 
     As described above, according to the present invention, it is possible to change a difficulty level of a game by changing the position of a reference portion at which an operation indication mark is to arrive. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a diagram illustrating a game machine for business use to which a game system according to an embodiment of the present invention is applied. 
         FIG. 2  is a functional block diagram of a game machine. 
         FIG. 3  is a diagram schematically illustrating a game screen. 
         FIG. 4  is a diagram for describing a region of an object. 
         FIG. 5  is a diagram schematically illustrating a game screen in which a high difficulty level is set. 
         FIG. 6  is an enlarged view of an object for describing a region corresponding to a specific moving path. 
         FIG. 7  is a diagram schematically illustrating a game screen for describing an object appearance area. 
         FIG. 8  is a diagram illustrating an example of content of sequence data. 
         FIG. 9  is a diagram illustrating an example of a flowchart of a sequence process routine. 
         FIG. 10  is a diagram illustrating an example of a flowchart of a path decision process routine. 
         FIG. 11  is a diagram illustrating an example of a flowchart of an operation evaluating routine. 
         FIG. 12  is a diagram illustrating an example of a flowchart of a path correction process routine. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Hereinafter, an embodiment of a game system according to the present invention will be described.  FIG. 1  is a diagram illustrating a game machine for business use to which a game system according to an embodiment of the present invention is applied. As illustrated in  FIG. 1 , a game machine  1  includes a casing  2 , and a monitor  3  arranged, obliquely toward a player P side, on the top surface of the casing  2 . A transparent touch panel  5  is superimposed on the surface of the monitor  3 . The touch panel  5  is a known input device that outputs a signal corresponding to a contact position when the player P contacts the touch panel  5  with his/her finger or the like. In addition, the game machine  1  includes various kinds of input devices and output devices provided in a typical game machine for business use such as a button used to make a selection or a decision, a power switch, a volume operation switch, and a power lamp, which are not illustrated in  FIG. 1 . 
       FIG. 2  is a functional block diagram of the game machine  1 . As illustrated in  FIG. 2 , a control unit  10  serving as a computer is provided in the casing  2 . The control unit  10  includes a game control unit  11  serving as a control host, a display control unit  12  and an audio output control unit  13  which operate according to an output from the game control unit  11 . The game control unit  11  is configured as a unit in which a microprocessor is combined with various kinds of peripheral devices such as an internal storage device (for example, a read only memory (ROM) or a random access memory (RAM)) necessary for an operation of the microprocessor. The display control unit  12  causes a predetermined image to be displayed on the monitor  3  by rendering an image corresponding to image data provided from the game control unit  11  in a frame buffer and then outputting a video signal corresponding to the rendered image to the monitor  3 . The audio output control unit  13  causes a predetermined sound (including music or the like) to be reproduced from a speaker  14  by generating an audio reproduction signal corresponding to audio reproduction data provided from the game control unit  11  and then outputting the generated audio reproduction signal to the speaker  14 . 
     The game control unit  11  is connected with an external storage device  20 . As the external storage device  20 , there is used a storage medium in which data remains stored even when power is not supplied such as an optical storage medium including a digital versatile disc-read only memory (DVD-ROM), a compact disc-read only memory (CD-ROM) or the like, or a non-volatile semiconductor memory device including an electrically erasable programmable read-only memory (EEPROM) or the like. 
     A game program  21  and game data  22  are stored in the external storage device  20 . The game program  21  is a computer program necessary for the game machine  1  to execute a music game according to a predetermined procedure, and includes a sequence control module  23  and an evaluating module  24  in order to actualize a function according to the present invention. When the game machine  1  is activated, the game control unit  11  executes various kinds of initial settings necessary to operate as the game machine  1  by executing an operation program stored in an internal storage device thereof, and then sets an environment in which a music game is executed according to the game program  21  by reading the game program  21  from the external storage device  20  and executing the game program  21 . When the sequence control module  23  of the game program  21  is executed by the game control unit  11 , a sequence processing unit  15  is generated in the game control unit  11 . Further, when the evaluating module  24  of the game program  21  is executed by the game control unit  11 , an operation evaluating unit  16  is generated in the game control unit  11 . The sequence processing unit  15  and the operation evaluating unit  16  are logical devices actualize by a combination of computer hardware and a computer program. The sequence processing unit  15  executes music game processes such as a process of instructing the player to make an operation in tune with reproduction of music (music composition) selected by the player or generating a sound effect in response to the player&#39;s operation. The operation evaluating unit  16  executes processes such as a process of evaluating the player&#39;s operation and then controlling the game based on an evaluation result. Incidentally, the game program  21  includes various kinds of program modules necessary to execute a music game in addition to the modules  23  and  24 , and logical devices corresponding to the modules are generated in the game control unit  11  although not illustrated. 
     The game data  22  includes various pieces of data to be referred to when a music game is executed according to the game program  21 . For example, the game data  22  includes music data  25 , sound effect data  26 , and the image data  27 . The music data  25  refers to data necessary for reproducing and outputting music which is a target of the game from the speaker  14 .  FIG. 2  illustrates a single kind of music data  25 , but the player can actually select music to be played from among a plurality of pieces of music. In the game data  22 , one or more pieces of music data  25  are recorded in association with information identifying each piece of music. The sound effect data  26  is data in which each of one or more types of sound effects to be output from the speaker  14  in response to the player&#39;s operation is recorded in association with a unique code for each of the sound effects. Sounds of musical instruments and various kinds of sounds are included as the sound effect. Pieces of sound effect data which are equal in number to a predetermined octave number and have different musical pitches according to the kind may be prepared. The image data  27  is data used to cause a background image, various kinds of objects or icons, and the like in a game screen to be displayed on the monitor  3 . 
     The game data  22  further includes sequence data  28 . The sequence data  28  is data used to define an operation to be indicated to the player. At least a piece of sequence data  28  is prepared for single music data. The details of the sequence data  28  will be described later. 
     Next, an outline of a music game executed by the game machine  1  will be described. The game machine  1  is configured as a music game machine of a match-up type in which the two players execute an operation in tune with music (including a case in which the game machine  1  functions as the other player) and the operation timings of two players are evaluated.  FIG. 1  illustrates only one game machine, but the game may be played through a plurality of game machines  1  connected so as to share the game situation.  FIG. 3  is a diagram schematically illustrating a game screen. The game screen  50  includes a game region  52  used to guide an operation timing to the player and an information region  53  used to display a score and the like of each player. The game region  52  has a rectangular shape. A first reference portion  55 A and a second reference portion  55 B serving as reference portions are arranged at both ends of the game region  52  in a longitudinal direction so as to face each other. Each of the reference portions  55 A and  55 B extends in the form of a straight line in a direction orthogonal to the longitudinal direction of the game region  52 . 
     Each of the reference portions  55 A and  55 B is used as a reference of a current time on the game by a player of the game. Specifically, the first reference portion  55 A is used as a reference of a current time of a first player, and the second reference portion  55 B is used as a reference of a current time of a second player. At each reference portion  55 A or  55 B, different colors for each player are used for identifying each player. In the example of  FIG. 3 , a red straight line is used as the first reference portion  55 A, and a blue straight line is used as the second reference portion  55 B. Further, the information region  53  is arranged around the game region  52 . One end side of the game region  52  in the longitudinal direction is used for displaying a score and the like of one player, and the other end side thereof is used for displaying a score and the like of the other player. 
     Further, each of the reference portions  55 A and  55 B includes a plurality of rebounding points arranged at predetermined intervals. A plurality of rebounding points R 1  included in the first reference portion  55 A are connected with a plurality of rebounding points R 2  included in the second reference portion through a plurality of paths W, respectively. Specifically, provided are a plurality of paths W that reach from one rebounding point R 1  of the first reference portion  55 A to a plurality of rebounding points R 2  included in the second reference portion  55 B, and similarly, a plurality of paths W that reach from one rebounding point R 2  of the second reference portion  55 B to a plurality of rebounding points R 1  included in the first reference portion  55 A. A plurality of paths W extending from the rebounding point R 1  of the first reference portion  55 A extend up to the upper end portion  52 U at the second reference portion  55 B side while passing the rebounding point R 2 . Further, a plurality of paths W extending from the rebounding point R 2  of the second reference portion  55 B extend up to the lower end portion  52 B at the first reference portion  55 A side while passing the rebounding point R 1 . In the example of  FIG. 3 , all of a plurality of paths W are indicated by dashed lines. As illustrated in  FIG. 3 , in this example, three paths W 1 , W 2 , and W 3  extending from the rebounding point R 1  toward the three rebounding points R 2  included in the second reference portion  55 B are set to a certain rebounding point R 1  of the first reference portion  55 A as a plurality of paths W. During execution of a music game, that is, during the progress of reproduction of music, the object  60  serving as the operation indication mark indicating an operation is displayed on the path W connecting the rebounding point R 1  with the rebounding point R 2  according to the sequence data  28 . Incidentally, in  FIG. 3 , for convenience of description, the paths W 1 , W 2 , and W 3  are indicated by the dashed lines, but any of a plurality of paths W is not displayed on the actual game screen  50 A. 
     The object  60  appears at the rebounding point R 1  or the rebounding point R 2  at an appropriate timing in music, and then moves along the path W extending from the rebounding point R 1  or R 2  at the appearance position from one of the rebounding points R 1  and R 2  at the appearance position toward the other of the rebounding points R 1  and R 2  positioned at the opposite side according to the progress of the music. Then, when an appropriate operation is executed in tune with an arrival of the object  60 , the object  60  disappears. In tune with the disappearance of the object  60 , a next object  60  appears on the rebounding point R 1  or R 2  of the reference portion  55 A or  55 B on which an appropriate operation has been made. In other words, the arrival position of the object  60  serves as the appearance position of the next object  60 . The object  60  that appears at the appearance position moves toward the rebounding point R 1  or R 2  positioned at the opposite side from the appearance position. For this reason, when an appropriate operation is made, the object  60  alternately and repeatedly moves between the reference portions  55 A and  55 B as if the object  60  rebounds from the rebounding points R 1  and R 2 . Meanwhile, when an appropriate operation is not made, the object  60  passes through the reference portion  55 A or  55 B along each path W and so moves up to an upper end portion  52 U or a lower end portion  52 B. And, the position of the end portion  52 U or  52 B at which the object  60  has arrived serves as the appearance position of the next object  60 . For this reason, when an appropriate operation is not made, the object  60  changes a moving direction toward the reference portion positioned at the opposite side from the end portion  52 U or  52 B as if the object  60  rebounded from the end portion  52 U or  52 B. 
     As an appropriate operation, each player is required to perform a touch operation of touching the position of the reference portion  55 A or  55 B at which the object  60  has arrived in tune with an arrival of the object  60  at the reference portion  55 A or  55 B. When each player performs the touch operation, a time difference between a time when the object  60  matches each of the reference portions  55 A and  55 B and a time when each player has performed the touch operation is detected. The smaller the time difference is, the higher an operation of the player is evaluated. Further, a sound effect is reproduced from the speaker  14  in response to the touch operation. A well-known method may be used as a method of reproducing the sound effect. For example, as a well-known method of reproducing a sound effect, there is a method of adding a sound effect on music while reproducing the music or a method of reproducing a sound effect corresponding to a misoperation while muting the music when missed. Further, for example, there is also a method in which music is divided in parts, each part is assigned to each operation timing, and a part of the music assigned to the corresponding operation timing is played back when an appropriate operation is executed (a method of forming the music by an appropriate operation at each operation timing. For this reason, when a misoperation is made, a part of the music to which the operation timing is assigned is not reproduced). 
     In the example of  FIG. 3 , the object  60  is moving on the path W 2  toward the rebounding point R 2  of the second reference portion  55 B. And, it is preferable that the second player using the second reference portion  55 B as the reference of the current time performs the touch operation at the position of the second reference portion  55 B at which the object  60  arrives in tune with an arrival at the second reference portion  55 B. Further, the object  60  is displayed in color corresponding to the reference portion  55 A or  55 B of a destination toward which the object  60  is currently moving. In other words, in the example of  FIG. 3 , the object  60  is displayed in blue until arriving at the rebounding point R 2  of the second reference portion  55 B, and a next object  60  appearing at the rebounding point R 2  at the arrival position is displayed in red. In this embodiment, a plurality of operating units are configured by a combination of each of the reference portions  55 A and  55 B on the monitor  3  and the touch panel  5  superimposed thereon. Incidentally, in the following, each of the reference portions  55 A and  55 B may be used as a term representing the operating unit. 
     The path W along which the object  60  moves from one of the rebounding points R 1  and R 2  at the arrival position to the other of the rebounding points R 1  and R 2  at the opposite side is decided according to the position of the object  60  when the reference portion  55 A or  55 B is touched. In order to make a comparison of position easy, the object  60  is divided into a plurality of regions.  FIG. 4  is a diagram for describing regions of the object  60 . In  FIG. 4 , dashed lines represent the paths W 1 , W 2 , and W 3 , and an alternate long and short dash line  62  represents the boundary between the regions. In the example of  FIG. 4 , the object  60  is divided into four regions, that is, a contact region S near a contact point at which the object  60  first comes in contact with the reference portion  55 A or  55 B, right and left regions R and L that establish the boundary of the contact region S, and the remaining region O. And, as a path along which the object  60  moves, from among the paths W reaching to the rebounding point R 1  from the rebounding point R 2 , the straight line path W 2  reaching to the rebounding point R 1  at the shortest distance is selected when near the contact region S or the remaining region O (including these regions S and O) is touched, the first right path W 3  reaching to the rebounding point R 1  through a right side wall  52 R of the game region  52  in the longitudinal direction is selected when near the left region L (including the region L) is touched, and the first left path W 1  reaching to the rebounding point R 1  through a left side wall  52 L of the game region  52  in the longitudinal direction is selected when near the right region R (including the region R) is touched. In other words, the moving path used when the object  60  moves to the reference portion  55 A or  55 B of the next destination is decided according to a positional relation between an operation position of the touch operation and the position of the object  60 . Since the moving distance differs according to the moving path, the moving distance along which the object  60  moves to the reference portion  55 A or  55 B of the next destination differs according to the positional relation between the operation position and the position of the object  60 . Meanwhile, an operation timing to touch the object  60 , that is, a timing at which the object  60  arrives at each of the reference portions  55 A and  55 B is constant regardless of the moving path. For this reason, the moving velocity of the object  60  differs according to the moving path. In other words, the path W and the moving velocity of the object  60  that moves toward one player change according to the other player&#39;s touch operation. Since this changes a difficulty level of a game, each player executes his/her operation while being conscious of influence of the other player. 
     In a music game executed by the game machine  1 , a difficulty level can be set before playing.  FIG. 5  is a diagram schematically illustrating a game screen when a difficulty level higher than that of the game screen of  FIG. 3  is set before playing as a difficulty level of the game. As illustrated in  FIG. 5 , a game screen  50 B in which a high difficulty level is set is provided with two top reference portions  55 T serving as specific reference portion, respectively, near the reference portions  55 A and  55 B as compared with the game screen  50 A of  FIG. 3 . Each top reference portion  55 T is arranged at the position at which a distance to the reference portion positioned at the opposite side is different from a distance between the reference portions  55 A and  55 B. In the example of  FIG. 5 , each top reference portion  55 T is arranged at the position at which the distance is shorter than the distance between the reference portions  55 A and  55 B. In other words, two first top reference portions  55 TA at the first reference portion  55 A side are provided above the first reference portion  55 A so as to be near the second reference portion  55 B, and two second top reference portions  55 TB at the second reference portion  55 B side are provided below the second reference portion  55 B so as to be near the first reference portion  55 A. 
     In the example of  FIG. 5 , the top reference portions  55 T are formed in a circle having the same shape and size as the object  60 . Each of the top reference portions  55 T is provided with a determination straight line TL that extends on the center thereof in parallel with each of the reference portions  55 A and  55 B. Each determination straight line TL is combined with the same color as the reference portion positioned near there. In other words, the determination straight line TL of each first top reference portion  55 TA positioned near the first reference portion  55 A is combined with red, and the determination straight line TL of the second top reference portion  55 TB positioned near the second reference portion  55 B is combined with blue. 
     Further, a specific object  60 S that moves toward the top reference portion  55 T appears on the game screen  50 B to which the high difficulty level is set at an appropriate timing of music. The appeared specific object  60 S moves toward any one of the top reference portions  55 T. Further, the moving path W of the specific object  60 S is decided by an immediately previous operation. However, the moving path W is limited to a specific moving path WS serving as a predetermined path such that movement of the specific object  60 S is not inappropriate to an indication of an operation timing. 
     Furthermore, as an appropriate operation corresponding to the specific object  60 S, each player is requested to perform a touch operation of touching the determination straight line TL in tune with an arrival of the specific object  60 S at the determination straight line TL of each top reference portion  55 T. When the touch operation is performed, a time difference between a time at which the specific object  60 S matches the determination straight line TL and a time at which each player performs the touch operation on the determination straight line TL is detected, similarly to the case in which the object  60  matches the reference portion  55 A or  55 B. The smaller the time difference is, the higher the player&#39;s operation is evaluated. In this case, the determination straight line TL of each top reference portion  55 T is used as a reference of a current time instead of the reference portion  55 A or  55 B. Further, the specific object  60 S is displayed in a color different from the object  60  to be distinguished from the normal object  60 . 
     In the example of  FIG. 5 , the specific object  60 S represented by an alternate long and two short dashes line represents the appearance position of the specific object  60 S. As illustrated in  FIG. 5 , in this example, the specific object  60 S appears on the second reference portion  55 B, a first specific path WS 1  that heads toward the first top reference portion  55 TA arranged at the left side and a second specific path WS 2  that heads toward the first top reference portion  55 TA arranged at the right side are provided as candidates of the moving path WS of the appeared specific object  60 S. In other words, the number of the moving paths WS of the specific object  60 S is limited to two. 
     Further, the moving path WS of the specific object  60 S is decided depending on the touch operation on the object  60  that has arrived at the appearance position immediately before the specific object  60 S appears. Specifically, the moving path WS of the specific object  60 S is decided depending on a region of the object  60 , arrived at the appearance position immediately before, on which the touch operation is performed.  FIG. 6  is an enlarged view of the object  60  for describing a region corresponding to a specific moving path. A dashed line of  FIG. 6  represents a central line CL that equally divides the object  60  into two regions. Further, the central line CL extends in a direction orthogonal to the reference portions  55 A and  55 B. The object  60  is equally divided into two regions, that is, a first region OR 1  which is a right region and a second region OR 2  which is a left region, by the central line CL. And, when the touch operation is performed on a region around the first region OR 1  (including the region OR 1 ), the first specific path WS 1  is decided as the moving path, whereas when the touch operation is performed on a region around the second region OR 2  (including the region OR 2 ), the second specific path WS 2  is decided as the moving path. Incidentally, when the touch operation is performed on the central line CL, either of the specific paths WS 1  and WS 2  is randomly decided as the moving path. 
     The example of  FIG. 5  represents that the touch operation is performed on the second region OR 2  of the object  60  which has arrived at the appearance position of the specific object  60 S immediately before as the immediately previous operation. For this reason, in this example, the specific object  60 S moves toward the first top reference portion  55 TA arranged at the right side along the second specific path WS 2  in response to the touch operation. In this case, each player preferably performs the touch operation on the determination straight line TL of the first top reference portion  55 TA in tune with an arrival of the specific object  60 S at the first top reference portion  55 TA arranged at the right side. Further, in the example of  FIG. 5 , two colors, that is, a color corresponding to the determination straight line TL of a movement destination arranged on a central portion and green arranged therearound are used as a color of the specific object  60 S. Specifically, in the example of  FIG. 5 , a range represented by a right hatched line HR is combined with green, and a central portion surrounded by the right hatched line HR, that is, a range represented by a left hatched line HL is combined with red which is combined with the determination straight line TL of the first top reference portion  55 TA of the movement destination. 
     Further, in the example of  FIG. 5 , when an appropriate operation is not performed, that is, when a misoperation is made, the specific object  60 S passes through the determination straight line TL, and then disappears at a predetermined position in front of the first reference portion  55 A or the second reference portion  55 B. The specific object  60 S represented by the dashed line of  FIG. 5  represents the disappearance position of the specific object  60 S. In other words, as illustrated in  FIG. 5 , unlike the moving path W of the normal object  60  extending up to both end portions  52 U and  52 B, both of the specific paths WS 1  and WS 2  are set to extend to the position which does not reach to the reference portion  55 A or  55 B. For this reason, the specific object  60 S disappears without arriving at the first reference portion  55 A or the second reference portion  55 B. 
     Furthermore, an object appearance area CR at which the object  60  appears is set to the game screen  50 B to which the high difficulty level is set, separately from the reference portions  55 A and  55 B or both end portions  52 U and  52 B. The object appearance area CR is used in order to cause a next object to appear at the position which is inconsecutive to neither the arrival position of the object nor the position at which an appropriate operation is made. For example, the object appearance area CR is used as an appearance position of a next object  60  which was supposed to appear at the position at which the specific object  60 S disappeared by a misoperation was to arrive. 
       FIG. 7  is a schematic diagram illustrating a state in which the object  60  appears in the object appearance area CR. In the example of  FIG. 7 , an area between each top reference portion  55 T and each of the reference portions  55 A and  55 B is set as the object appearance area CR. Specifically, an area between an extended line of the determination straight line TL of the first top reference portion  55 TA and the first reference portion  55 A is set as a first object appearance area CR 1 , and an area between an extended line of the determination straight line TL of the second top reference portion  55 TB and the second reference portion  55 B is set as a second object appearance area CR 2 . In the example of  FIG. 7 , the extended line of each determination straight line TL is represented by a dashed line RL. Incidentally, the dashed line RL representing each extended line is not displayed on the actual game screen. 
     Further, in the example of  FIG. 7 , the next object  60  corresponding to the specific object  60 S that has disappeared in  FIG. 5  appears in the first object appearance area CR 1 . The object  60  that has appeared in the first object appearance area CR 1  moves toward the second reference portion  55 B along a predetermined path WC. The predetermined path WC is set for each appearance position of the object appearance area CR in advance. As illustrated in  FIG. 7 , when the specific object  60 S moves toward the first top reference portion  55 TA and then disappears, the next object  60  appears in the first object appearance area CR 1 , and the appeared object  60  moves toward the second reference portion  55 B. On the other hand, when the specific object  60 S moves toward the second top reference portion  55 TB and then disappears, the next object  60  appears in the second object appearance area CR 2 , and the appeared object  60  moves toward the first reference portion  55 A. The appearance position in each object appearance area CR is randomly decided. 
     Next, the details of the sequence data  28  will be described with reference to  FIG. 8 . The sequence data  28  includes a condition definition portion  28   a  and an operation sequence portion  28   b  as illustrated in  FIG. 8 . The condition definition portion  28   a  includes information described to designate an execution condition of a game that differs according to the music, such as information designating the tempo, a beat, and a track of the music, and a sound effect to be generated when the touch operation is performed on the object  60 . Incidentally, in  FIG. 8 , the condition definition portion  28   a  is included only in the head portion of the sequence data  28 , but the condition definition portion  28   a  may be added to an appropriate intermediate position of the operation sequence portion  28   b . Thus, processing of changing the tempo in the music, an assignment of the sound effect, or the like can be actualized. 
     Meanwhile, in the operation sequence portion  28   b , a timing to touch the object  60  and information indicating a player side on which the object starts to be displayed are described in association with each other for each object  60 . Further, in the operation sequence portion  28   b , information indicating a correspondence relation of each object  60  is described. 
       FIG. 8  is a diagram illustrating an example of content of the sequence data. As partially illustrated in  FIG. 8 , the operation sequence portion  28   b  includes an operation timing portion  28   c  that indicates a timing (operation timing) to make an operation in music, a player indicating portion  28   e  indicating a player in which the object  60  starts to be displayed, a mark information portion  28   f  indicating the object  60  to be displayed, a relation indicating portion  28   g  indicating a correspondence relation between the objects  60 , and a record information portion  28   h  for discriminating between records. Thus, the operation sequence portion  28   b  is configured as a set of a plurality of records which are described in such a manner that an operation timing at which an operation is performed in the music is associated with a position at which the object  60  starts to be displayed for each object  60  to be displayed. 
     The operation timing is described such that a bar number in the music, the number of beats, and a value representing a time in a beat are separated by a comma. A time in a beat refers to an elapsed time from the head of one beat, and is represented by the number of units, from the head of the beat, obtained by equally dividing the length of one beat into n unit times. For example, when a time in which n is 100, and in a second beat of a first bar of the music ¼ elapses from the head of the second beat is designated as an operation timing, “01,2,025” is described. 
     Information indicating a player side at which the object  60  starts to be displayed is described in the player indicating portion  28   e . Specifically, “P 1 ” is described when the first reference portion  55 A side corresponding to a first player is indicated, and “P 2 ” is described when the second reference portion  55 B side corresponding to a second player is indicated. Further, since the object  60  moves between the reference portions  55 A and  55 B, an indication of a player in which a display start is performed corresponds to an indication of a reference portion at which the touch operation is requested to be performed. Specifically, when the first reference portion  55 A side is indicated as the position at which a display is started, the object  60  that has started to be displayed moves toward the second reference portion  55 B at the opposite side and thus this corresponds to an indication of the touch operation on the second reference portion  55 B. Similarly, when the second reference portion  55 B side is indicated as the position at which a display is started, this is corresponds to an indication at the opposite side, that is, an indication of the touch operation on the first reference portion  55 A positioned in the moving direction of the object  60  that has started to be displayed. Furthermore, an indication of a player in which the object  60  starts to be displayed also corresponds to an indication of a color of the object  60  to be displayed. A blue object is displayed in case of “P 1 ,” and a red object  60  is displayed in case of “P 2 .” 
     Further, the player indicating portion  28   e  includes information indicating the object appearance area CR as the appearance position of the object  60 . Specifically, “R 1 ” is described in the player indicating portion  28   e  when the first object appearance area CR 1  is indicated as the appearance position of the object  60 , and “R 2 ” is described in the player indicating portion  28   e  when the second object appearance area CR 2  is indicated as the appearance position of the object  60 . A timing at which the object  60  appears in each object appearance area CR is set to before one bar of operation timing. Further, a specific appearance position of each of the objects  60  and  60 S in each object appearance area is randomly decided. Incidentally, a timing at which the object  60  appears in each object appearance area CR may be appropriately set. Further, a different timing may be set for each object. Furthermore, information indicating a timing at which the object  60  is to appear in each object appearance area CR may be included in the operation sequence portion  28   b.    
     In the mark information portion  28   f , a letter such as “A” is described as information indicating the object  60  to be displayed. “A” is used as a letter of alphabet corresponding to the first object  60  to be displayed on the game region  52 , “B” is used as a letter of alphabet corresponding to the second object  60 , and “C” is used as a letter of alphabet corresponding to the third object  60 . In other words, various kinds of letters according to the number of objects  60  to be displayed on the game region  52  are used as information indicating the object  60  to be displayed. 
     Furthermore, the mark information portion  28   f  includes information indicating use of the specific object  60 S. In the example of  FIG. 8 , “SS” is used to indicate the specific object  60 S. A dashed line  28   s  of  FIG. 8  represents a record instructing that the specific object  60 S starts to be displayed. 
     A number corresponding to a sorting order is described in the record information portion  28   h  for each record. In other words, as record information, “1” is affixed to a first record, and then a unique number such as “2” and “3” is affixed to each record in order from the top. 
     Information designating a record number is described in the relation indicating portion  28   g . In other words, a number such as “1,” “2,” and “3” is described as information indicating a correspondence relation. When “1” is described in the relation indicating portion  28   g , a correspondence relation with a record in which “1” is affixed to the record information portion  28   h  is indicated. Specifically, an indication is made such that the position at which an object  60  corresponding to the number 1 of the record information portion  28   h  is appropriately touched or the position at which the object  60  arrives by a misoperation is used as the appearance position of the object  60  corresponding to a record in which “1” is described in the relation indicating portion  28   g . Similarly, an indication is made such that the position at which an object  60  corresponding to a record in which “2” is affixed to the record information portion  28   h  is appropriately touched or the position at which the object  60  arrives is used as the appearance position when “2” is described in the relation indicating portion  28   g . Further, an indication is made such that the position at which an object  60  corresponding to a record in which “3” is affixed to the record information portion  28   h  is appropriately touched or the position at which the object  60  arrives is used as the appearance position when “3” is described in the relation indicating portion  28   g . Based on the description of the record information portion  28   h  and the relation indicating portion  28   g , an object corresponding to a record in which one number is affixed to the record information portion  28   h  corresponds to one operation indication mark of the present invention, and an operation indication mark corresponding to a record in which the one number is described in the relation indicating portion  28   g  corresponds to a next operation indication mark of the present invention. 
     Furthermore, an indication of the relation indicating portion  28   g  corresponds to an indication of an appearance timing. Specifically, the object  60  corresponding to the record in which “1” is described in the relation indicating portion  28   g  starts to be displayed at a timing at which the object  60  corresponding to the record in which “1” is affixed to the record information portion  28   h  is appropriately touched (or a timing at which the object  60  arrives). In other words, in order to cause the object  60  to keep continuity, an indication causing a certain record to be associated with a record corresponding to a next object  60  is described in the relation indicating portion  28   g  so that the next object  60  can start to be displayed at the position at which the object  60  arrives (or a timing at which the object  60  is appropriately touched) at a timing at which the object  60  corresponding to the certain record arrives (or a timing at which the object  60  is appropriately touched). 
     Incidentally, in the example of  FIG. 8 , “S” indicating an initial display (in which a setting such as a display start which is performed at a fixed position at a fixed timing is made in advance) is described in a first record. Further, when the object appearance area CR is indicated in the player indicating portion  28   e , description of information of the relation indicating portion  28   g  is not used. For this reason, description of information of the relation indicating portion  28   g  may not be made. Alternatively, certain information may be described in the relation indicating portion  28   g , and this information may be used in decision of an appearance position in the object appearance area CR. 
     In the example of  FIG. 8 , an operation timing and a reference portion of a touch operation target are indicated such that a touch operation is performed on the second reference portion  55 B at a timing in which “010” elapses from a start point in time of a fourth beat of a first bar, and a touch operation is performed on the first reference portion at a timing in which “016” elapses from the start point in time of the fourth beat of the first bar. Further, a correspondence relation between objects is indicated such that the red object  60  corresponding to the record with the number 2 appears at the position at which the object  60  corresponding to the record with the number 1 is appropriately touched or at the position at which the object  60  arrives, and the object  60  moves along the path W according to the player&#39;s operation so as to arrive at the first reference portion  55 A at a timing at which “016” elapses from the start point in time of the fourth beat of the first bar. 
     Furthermore, in the example of  FIG. 8 , an object  60  corresponding to a record with a number  21  appears at the position at which an object  60  corresponding to a record (not illustrated) with a number  20  is appropriately operated or at the position at which the object  60  arrives, and the object  60  moves so as to arrive at the first reference portion  55 A at a timing in which “030” elapses from a start point in time of a second beat of a second bar. Further, the object  60  appears in the second object appearance area CR 2  at a timing which is one bar earlier than a timing in which “036” elapses from the start point in time of the second beat of the second bar, that is, a timing in which “036” elapses from the start point in time of the second beat of the first bar, and the object  60  moves so as to arrive at the first reference portion  55 A at a timing in which “036” elapses from the start point in time of the second beat of the second bar. And, the object  60  and the specific object  60 S appear at the position at which an object  60  corresponding to a record with a number  23  is appropriately operated or the position at which the object  60  arrives. The appeared object  60  moves so as to arrive at the second reference portion  55 B at a timing in which “040” elapses from the start point in time of the second beat of the second bar. Meanwhile, the appeared specific object  60 S moves so as to arrive at the second top reference portion  55 TB at a timing in which “040” elapses from the start point in time of the second beat of the second bar. In both cases, an operation timing and a reference portion of a touch operation target are indicated such that the reference portion  55 A,  55 B, or  55 T at the arrival position is touched in tune with an arrival of the object  60  or  60 S at the reference portion  55 A,  55 B, or  55 T. 
     Next, processing of the game control unit  11  when the music game is executed by the game machine  1  will be described. The game control unit  11  reads the game program  21 , performs an initial setting necessary to execute a music game, and then enters a standby state to receive a game start instruction from a player. For example, the game start instruction includes an operation specifying data used in a game such as selection of music to be played in the game or a difficulty level. A procedure receiving the instruction may be the same as in a known game. 
     When a game start is instructed, the game control unit  11  causes the music to be reproduced from the speaker  8  by reading the music data  25  corresponding to the music selected by the player and outputting the read music data  25  to the audio output control unit  13 . Through this operation, the control unit  10  functions as a music reproducing device. Further, the game control unit  11  causes the game region  52  and the information region  53  to be displayed on the monitor  3  by reading the sequence data  28  corresponding to the player&#39;s selection in synchronization with reproduction of the music, generating image data necessary to draw the game region  52  and the information region  53  with reference to the image data  27 , and outputting the generated image data to the display control unit  12 . Furthermore, as processes necessary to display the game region  52  or the like during execution of the music game, the game control unit  11  repeatedly executes a sequence process routine illustrated in  FIG. 9 , a path decision process routine illustrated in  FIG. 10 , and an operation evaluation routine illustrated in  FIG. 11  at a predetermined period. Incidentally, the sequence processing unit  15  undertakes the routines of  FIGS. 9 and 10 , and the operation evaluating unit  16  undertakes the operation evaluation routine of  FIG. 11 . 
       FIG. 9  illustrates an example of a flowchart of the sequence process routine executed by the sequence processing unit  15 . When the routine of  FIG. 9  starts, in step S 1 , the sequence processing unit  15  of the game control unit  11  first acquires a current time in the music. For example, clocking starts, by an internal clock of the game control unit  11 , from a reproduction start point in time of the music, and the current time is acquired based on a value of the internal clock. Next, in step S 2 , the sequence processing unit  15  acquires data of an operation timing which is present within a time length corresponding to a display range of the game region  52  from the sequence data  28 . For example, the display range is set to a time range of about two bars of music from the current time to the future. 
     Next, in step S 3 , paths W of all objects to be displayed in association with the acquired operating timings are decided. For example, this decision is actualized by executing the routine of  FIG. 10  on each object.  FIG. 10  illustrates an example of a flowchart of the path decision process routine executed by the sequence processing unit  15 . When the routine of  FIG. 10  starts, in step S 11 , the sequence processing unit  15  first determines whether or not this is a start time of the game. When a positive determination is made in this step S 11 , the process proceeds to step S 22 , but when a negative determination is made, the process proceeds to step S 12 . In step S 22 , a previously set initial path is selected as a path to display the object, and then the process proceeds to step S 21 . For example, the path W 3  extending from the rebounding point R 1  which is included in the first reference portion  55 A and which is at an n-th position from the left side is set in advance as the initial path. 
     Meanwhile, in step S 12 , it is determined whether or not the object  60  or  60 S to be displayed is already moving along the path W. When a positive determination is made in step S 12 , that is, when it is determined that the object of the determination target is already moving along the decided path W, the process proceeds to step S 23 . In step S 23 , a previously selected path, that is, a current path is selected as a path to be displayed, and the process proceeds to step S 21 . 
     In contrast, when a negative determination is made in step S 12 , that is, when it is determined that the object of the determination target is not moving along the path W, the process proceeds to step S 13 . In step S 13 , it is determined whether or not the object appearance area CR is indicated on the object of the determination target as the appearance position with reference to the player indicating portion  28   e  of the sequence data  28 . When a positive determination is made, that is, when it is determined that the object appearance area CR is indicated, the process proceeds to step S 24 . In step S 24 , the appearance position is randomly decided in either of the indicated first object appearance area CR 1  or the second object appearance area CR 2 , the path WC set to the decided appearance position is selected as a predetermined path, and the process proceeds to step S 21 . 
     When a negative determination is made in step S 13 , that is, when it is determined that the object appearance area CR is not indicated, the process proceeds to step S 14 . In step S 14 , it is determined whether or not the reference portion  55 A,  55 B, or  55 T has been touched with reference to the output signal of the touch panel  5 . When a negative determination is made in step S 14 , the process proceeds to step S 25 , but when a positive determination is made, the process proceeds to step S 15 . 
     In step S 25 , it is determined whether or not an object of a determination target has a correspondence relation with the specific object  60 S, that is, it is determined whether or not an object serving to indicate an appearance position of an object of a determination target is the specific object  60 S. When a positive determination is made, that is, when it is determined that an object serving to indicate an appearance position of an object of a determination target is the specific object  60 S, the process proceeds to step S 24 . In step S 24 , first, among the object appearance areas CR, an indicated area is determined based on the sequence data  28  of the determination target. Then, as described above, an appearance position is randomly decided in each indicated area CR, the path WC set to the decided appearance position is selected as a predetermined path, and then the process proceeds to step S 21 . 
     When a negative determination is made in step S 25 , that is, when it is determined that an object serving to indicate an appearance position of an object of a determination target is not the specific object  60 S, the process proceeds to step S 26 . In step S 26 , a predetermined path is selected as a path to display an object, and then the process proceeds to step S 21 . For example, a path adjacent to a moving path of an object in which a relation is indicated in the sequence data  28  and which has already moved along a decided path, or a path having a shortest distance extending from an arrival position of the object is set as the predetermined path of step S 26 . Further, when the object of the determination target is the specific object  60 S, a setting may be made to use a path randomly selected from the specific path WS as the predetermined path. 
     Meanwhile, in step S 15 , a reference portion on which the touch operation has been performed and a timing (a time in the music) at which the touch operation has been performed are determined based on a signal output from the touch panel  5 . Next, in step S 16 , a nearest operation timing described in the sequence data  28  with respect to the reference portion on which the touch operation has been performed, that is, an operation timing which is closest in time and associated in the sequence data  28  with respect to the object on which the touch operation has been performed is specified, and a time difference between the operation timing and a time at which the touch operation has been performed is acquired. 
     Next, in step S 17 , the sequence processing unit  15  determines whether or not each player&#39;s operation is appropriate by determining whether or not the time difference is within a predetermined range. A predetermined time range around an operation timing of a comparison target is set as the predetermined range. When a negative determination is made in step S 17 , the process proceeds to step S 26 , and a predetermined path is selected as a path to display the object as described above, and then the process proceeds to step S 21 . In contrast, when a positive determination is made in step S 17 , the process proceeds to step S 18 . 
     In step S 18 , it is determined whether or not the object of the determination target is the specific object  60 S with reference to the mark information portion  28   f  of the sequence data  28 . When a positive determination is made, that is, when it is determined that the object of the determination target is the specific object  60 S, the process proceeds to step S 27 . In step S 27 , the positional relation between the touched operation position of the top reference portion  55 T and the position of the object  60  is determined based on the signal output from the touch panel  5 . Specifically, a region of the object having the correspondence relation with the object of the determination target, that is, a region of the object serving to indicate the appearance position of the object of the determination target is determined as the touch position. In this case, either of the regions OR 1  and OR 2  equally divided by the central line CL of  FIG. 6  described above is determined as the touch position. Next, in step S 28 , the specific path WS to arrange the specific object  60 S is selected according to the positional relation determined in step S 27 . For example, this selection is made such that the first specific path WS 1  previously assigned to the region OR 1  is selected when the touch position is a region (including the region OR 1 ) around the first region OR 1 , and the second specific path WS 2  previously assigned to the region OR 2  is selected when the touch position is a region (including the region OR 1 ) around the second region OR 2 . Incidentally, when the touch position is on the central line CL, any one of the specific paths WS 1  and WS 2  is randomly selected. 
     Meanwhile, when a negative determination is made in step S 18 , that is, when it is determined that the object of the determination target is not the specific object  60 S, the process proceeds to step S 19 . In step S 19 , the positional relation between the touched operation position of the reference portion  55 A or  55 B and the position of the object is determined based on the signal output from the touch panel  5 . The regions S, O, R, and L described with reference to  FIG. 4  are used for the determination of the positional relation. Specifically, a region (including each region) around the contact region S, the right region R, the left region L, or the remaining region of the object having the correspondence relation with the object of the determination target, that is, the object  60  that has most recently arrived at the appearance position of the object of the determination target is determined as the touch position. 
     Next, in step S 20 , a path to arrange the object  60  is selected according to the positional relation determined in step S 19 . For example, the selection of the path is performed as follows. First, the right region R, the left region L, the contact region S, or the remaining region O is assigned to each path W set to the appearance position in advance. Next, a path assigned to the touch position is selected from among the paths W extending from the appearance position based on the determination result of step S 19 . In the example of  FIG. 3 , in the rebounding point R 1 , a straight line path W 2  is assigned to the contact region S and the remaining region O, a first right path W 3  is assigned to the left region L, and a first left path W 1  is assigned to the right region R. And, the straight line path W 2  is selected when the contact region S or the remaining region O of the object is touched, the first left path W 1  is selected when the right region R is touched, and the first right path W 3  is selected when the left region L is touched. 
     Next, in step S 21 , the path selected in step S 20 , step S 22 , step S 23 , step S 24 , step S 26 , or step S 28  is decided as a path to display the object, and the current routine ends. 
     Referring back to the routine of  FIG. 9 , in step S 4 , the sequence processing unit  15  calculates coordinates of all objects  60  and  60 S to be displayed on each path W in the game region  52 . For example, this calculation is performed as follows. First, the path W to display each object  60  or  60 S included in the display range is determined based on the processing result of step S 3 . Next, the position of each object  60  or  60 S from the reference portion  55 A,  55 B, or  55 T in the time axis direction (that is, the moving direction of the object) is determined according to the moving direction (the reference portion  55 A,  55 B, or the  55 T as the arrival position) corresponding to each the object  60  or  60 S and a time difference between each operation timing and a current time. Through this operation, it is possible to acquire the path W to arrange each object  60  or  60 S and coordinates of each object  60  or  60 S necessary to arrange each object  60  or  60 S on the corresponding path W along the time axis from the reference portion  55 A,  55 B, or the  55 T. 
     Next, in step S 5 , the sequence processing unit  15  generates image data necessary to draw the game region  52  based on the coordinates of the object  60  or  60 S calculated in step S 4 . Specifically, image data that causes each object  60  or  60 S to be arranged on the calculated coordinates is generated. An image of the object  60  or the like may be acquired from the image data  27 . Next, in step S 6 , the sequence processing unit  15  outputs the image data to the display control unit  12 . As a result, the game region  52  is displayed on the monitor  3 . When the process of step S 6  ends, the sequence processing unit  15  ends the current sequence process routine. By executing repeatedly the above-described process, the object  60  or  60 S moves among the reference portions  55 A,  55 B, and  55 T so as to arrive at the designated reference portion  55 A,  55 B or  55 T at an operation timing described in the sequence data  28  while maintaining continuity of movement. Further, when a misoperation is performed on the specific object  60 S, after the object  60 S disappears, a next object having a correspondence relation with the object  60 S appears in the object appearance area CR, and moves toward the reference portion at the arrival position. 
     Next, the operation evaluation routine of  FIG. 11  will be described. When the operation evaluation routine of  FIG. 11  starts, in step S 31 , the operation evaluating unit  16  first determines the presence or absence of the touch operation on the reference portion  55 A,  55 B, or  55 T with reference to an output signal of the touch panel  5 . At this time, when the position other than the reference portion  55 A,  55 B, or  55 T is touched, it is determined that no touch operation has been performed. When it is determined that no touch operation has been performed, the operation evaluating unit  16  ends the current routine, and when it is determined that the touch operation has been performed, the process proceeds to step S 32 . In step S 32 , the operation evaluating unit  16  determines a timing (a time in the music) at which the touch operation has been performed based on a position signal output from the touch panel  5 . Next, in step S 33 , the operation evaluating unit  16  specifies a nearest operation timing described in the sequence data  28  with respect to the reference portion on which the touch operation has been performed, that is, an operation timing which is closest in time in the sequence data  28  with respect to the reference portion on which the touch operation has been performed, and acquires a time difference between the operation timing and a time at which the touch operation has been performed. 
     Next, in step S 34 , the operation evaluating unit  16  determines whether or not the player&#39;s operation is appropriate by determining whether or not the time difference is within the evaluation range. A predetermined time range around an operation timing of a comparison target is set as the evaluation range. For example, a plurality of steps of levels are set centering on an operation timing, and a time range in which the levels are set is dealt as the evaluation range. When it is determined in step S 34  that the time difference is outside the evaluation range, the operation evaluating unit  16  ends the current routine, but when it is determined that the time difference is within the evaluation range, the process proceeds to step S 35 . In step S 36 , the operation evaluating unit  16  specifies an operation position at which the touch operation has been performed on the reference portion  55 A,  55 B, or  55 T and an operation timing which is closest in time in the sequence data  28  with respect to the reference portion at which the touch operation has been performed, and acquires a position difference between the operation position and the arrival position of the object indicating the operation timing. 
     Next, in step S 36 , the operation evaluating unit  16  decides an evaluation on the player&#39;s touch operation based on the time difference acquired in step S 34  and the position difference acquired in step S 35 . For example, this evaluation is actualized as follows. First, the evaluation related to the time difference is actualized by determining which one of a plurality of levels set in the time range a timing of the touch operation belongs to. A plurality of levels are set such that the time range is divided in units of predetermined time periods, and the touch operation that belongs to a division close to an operation timing of each division is evaluated high. Further, the evaluation related to the position difference is actualized by comparing the center position of the object  60  or  60 S and the touch operation position. For example, in the evaluation of the position difference, a region up to twice the diameter of the object  60  or  60 S is evaluated as “GOOD”, and the remaining region is evaluated as “MISS.” Alternatively, the inner side further than the outer circumference of the object  60  or  60 S may be evaluated highest, a predetermined evaluation range may be set such that an evaluation is steadily lowered in units of predetermined distances from the outer circumference, and the evaluation may be determined according to which position in the evaluation range the position of the touch operation belongs to. In this case, a difficulty level of a game is improved. 
     Incidentally, since both the evaluation range used for the time difference and the evaluation range used for the position difference are set based on the time range, an evaluation target region of a game screen differs according to the moving velocity of the object  60  or  60 S of an evaluation target. Specifically, when the moving velocity of the object  60  or  60 S is fast, the evaluation target region of the game screen  50 A or  50 B is set to a broad range. In contrast, when the moving velocity of the object  60  or  60 S is slow, the evaluation target region of the game screen  50 A or  50 B is set to a narrow range. Further, since the moving velocity of the object  60  is different from the moving velocity of the object  60 S, the evaluation target region of the game screen  50 A or  50 B of the object  60  or  60 S is set for each object. 
     After step S 36  is executed, the operation evaluating unit  16  proceeds to step S 37 , and controls an output to the display control unit  12  such that the evaluation result is displayed on at least one of the game region  52  and the information region  53 . When the process of step S 37  is completed, the operation evaluating unit  16  ends the current routine. Incidentally, a step acquiring the difference between the position of the object and the position of the touch operation in the example of  FIG. 11  may be executed before a step of acquiring the difference between the nearest operation timing of the reference portion and a time at which the touch operation has been performed. Further, in the example of  FIG. 11 , the evaluation of the position difference is configured so as to be evaluated as “GOOD” or “MISS” according to a region, but when the position difference is outside a predetermined range, similarly to the process of step S 34 , the subsequent process may be skipped, and then the current routine may end. In this case, for example, when an operation on the first reference portion  55 A is required, an operation on an inappropriate position outside a predetermined range such as an operation executed on the second reference portion  55 B can be excluded from an evaluation target. 
     As described above, according to this embodiment, in addition to the reference portions  55 A and  55 B at which the object  60  is to arrive, the top reference portion  55 T is provided, near reference portions  55 A and  55 B, on the game screen  50 B having a high difficulty level. Furthermore, the specific object  60 S moving toward each top reference portion  55 T is generated at an appropriate timing. For this reason, the player needs to consider the top reference portions  55 T as well as the two reference portions  55 A and  55 B arranged at both ends portions  52 U and  52 B of the game region  52 . Thus, it is possible to change the number of positions to which the player needs to give consideration, and it is possible to prevent the player&#39;s point of view from being fixed to a certain position. Accordingly, it is possible to change a difficulty level of a game without uniformly increasing the number of objects  60  displayed on the game screen nor uniformly increasing the moving velocity of all objects displayed on the game screen other than each object. 
     Further, the moving path of the specific object  60 S to each top reference portion  55 T is limited to the two specific paths WS 1  and WS 2 . If a path rebounding from the left or right walls  52 L or  52 R is selected as the moving path of the specific object  60 S, an arrival timing is constant, but a moving distance increases, and thus there is a case that the moving velocity is too fast inappropriately for an operation instruction. Further, when an object rebounds from either of the left and right walls  52 L and  52 R immediately before the top reference portion  55 T, an angle at which an object approaches the top reference portion  55 T may be excessively steep. The steep approach angle is difficult to be visually recognized, and is not appropriate to an operation indication. According to this embodiment, a path rebounding from the left or right wall  52 L or  52 R which is likely to cause an inappropriate approach angle or an inappropriate moving velocity is excluded, and the moving path WS of the specific object  60 S is limited to the two specific paths WS 1  and WS 2  heading toward each top reference portion  55 T. Thus, it is possible to prevent movement of the specific object  60 S from having a moving velocity or a display which is inappropriate to an indication of an operation timing. 
     And, the specific object  60 S disappears without arriving at the first reference portion  55 A or the second reference portion  55 B after passing through each top reference portion  55 T. If the specific object  60 S moves until it arrives at the end portion  52 U or  52 B similarly to the case in which a misoperation is performed on the object  60 , the moving velocity of an object to appear next is faster than the velocity at which the specific object  60 S has moved. Specifically, first, each top reference portion  55 T is arranged at the position close to the reference portion at the opposite side, and thus each top reference portion  55 T is arranged at the position which is farther from the end portion  52 U or  52 B than from each reference portion  55 A or  55 B. Meanwhile, an operation timing indicated by the next object having the correspondence relation with the specific object  60 S, that is, the object to appear at the arrival position of the specific object  60 S is constant. For this reason, the moving distance of the next object on which a misoperation is made is longer when a misoperation is made on the specific object  60 S than when a misoperation is made on the object  60 . In other words, the velocity difference between when a misoperation is made and when an appropriate operation is made is more remarkable when a misoperation is made on the specific object  60 S than when a misoperation is made on the object  60 . The slower the moving velocity of the specific object  60 S is, the more the velocity difference. In the example of  FIG. 5 , the number of the moving paths WS of the specific object  60 S is limited to two, but if the specific object  60 S moves along a long-distance path in which the specific object  60 S rebounds the left or right wall  52 L or  52 R twice or more and when the moving velocity of the specific object  60 S is slow, the velocity difference further increases. 
     Further, although the misoperated specific object  60 S does not move up to the end portion  52 U or  52 B, if the specific object  60 S keeps moving along the moving path WS, the specific object  60 S arrives at the first reference portion  55 A or the second reference portion  55 B. The touch operation on the specific object  60 S is already requested when the specific object  60 S arrives at each top reference portion  55 T. For this reason, it is unnecessary to request the player to perform the touch operation in tune with an arrival of the specific object  60 S at each reference portion  55 A or  55 B. When the specific object  60 S arrives at each reference portion  55 A or  55 B, the player&#39;s touch operation is likely to be induced, and thus it is necessary to prevent the induction of the operation. According to this embodiment, the specific object  60 S disappears after passing through each top reference portion  55 T, and thus the specific object  60 S is prevented from arriving at the first reference portion  55 A or the second reference portion  55 B. Thus, it is possible to prevent the induction of the unnecessary operation or the occurrence of the large velocity difference described above. 
     Furthermore, the object appearance area CR in which the object  60  or  60 S can appear is separately set. In the case of the normal object  60 , the object  60  moves up to the end portion  52 U or  52 B when a misoperation is made, the position at which the object  60  arrives serves as the appearance position of the next object, and the path W extending from the appearance position is used as the moving path of the next object. However, as described above, when the specific object  60 S disappears due to the misoperation, the specific object  60 S does not arrive at the end portion  52 U or  52 B. For this reason, there is no appropriate position at which the next object associated with the specific object  60 S is to appear. According to this embodiment, since the object appearance area CR is separately set, even in the case of the object having no appropriate appearance position, it is possible to cause the next object to appear using the area CR by a relatively natural rendering effect. Furthermore, when the object appears according to the appropriate operation, the object appearance area CR can be also used as the appearance position of the object whose moving velocity is excessively reduced due to the relation with the arrival timing. Thus, it is possible to prevent a game from being monotonous. 
     As described above, when the object appearance area CR is used, the position unrelated to the arrival position of the object serving to indicate the appearance position of the object cased to appear can be used as the appearance position. For this reason, it is possible to increase a degree of freedom of an appearance position or an appearance timing of an object. Thus, since it is possible to cause the object to appear without any limitation to the appearance position or the appearance timing, a continuous operation indication to one player or a rendering effect such as an event can be actualized. In other words, using the object appearance area CR, amusement of the game can be improved. 
     In the above embodiment, the external storage device  20  of the game machine  1  functions as a music data storage device and a sequence data storage device. Further, the control unit  10  functions as a game region presenting device, a mark display control device, and a position change device by causing the sequence processing unit  15  to execute the routines of  FIGS. 9 and 10 . Furthermore, the control unit  10  functions as an evaluating device by causing the operation evaluating unit  16  to execute the routine of  FIG. 11 . 
     The present invention is not limited to the above embodiment and can be actualized in appropriate embodiments. In the above embodiment, the specific reference portion is arranged at the position close to the reference portion  55 A or  55 B arranged at the opposite side, but the present invention is not limited to this embodiment. For example, the specific reference portion may be arranged at the position which is farther from the reference portion arranged at the opposite side than from the reference portion arranged at the same end portion side, that is, at the position at which the distance from the reference portion at the opposite side is larger than the distance between the reference portions  55 A and  55 B. 
     In the above embodiment, the two top reference portions  55 T are provided near the first reference portion  55 A and the second reference portion  55 B as the specific reference portion, but the number of specific reference portions is not limited to two. For example, one specific reference portion may be provided near each of the reference portions  55 A and  55 B, and three or more specific reference portions may be provided. Further, in the above embodiment, the specific reference portion corresponding to each player is provided near the reference portion at each player side, but the present invention is not limited to this embodiment. For example, the specific reference portion corresponding to each player may be provided near the reference portion at the opposite side to the reference portion used by each player. Further, the present invention is not limited to the embodiment in which the specific reference portion is arranged near another reference portion such as the first reference portion  55 A or the second reference portion  55 B, that is, at the position at which a distance from a certain reference portion is smaller than the distance from a reference portion other than the certain reference portion. For example, the specific reference portion may be arranged at the middle portion between the first reference portion  55 A and the second reference portion  55 B, that is, at the position at which the distance from the first reference portion  55 A is equal to the distance from the second reference portion  55 B. In this case, the specific reference portion may be shared by the player at the first reference portion  55 A side and the player at the second reference portion  55 B side or may be provided for each player. 
     Furthermore, a embodiment of the specific reference portion is not limited to the shape or the size described above, may have, for example, a quadrangular shape or an elliptical shape and the size larger than an object, or may be only a straight line corresponding to the determination straight line TL. Further, for example, the specific reference portion may be set by a rendering effect by which the position of the first reference portion  55 A or the second reference portion  55 B moves. Furthermore, a rendering effect by which the first reference portion  55 A and the second reference portion  55 B fade out of the game screen, and only the specific reference portion is displayed as the reference portion may be made. Through the fading-out effect, the induction of an unnecessary operation can be prevented even without causing the specific object  60 S to disappear. Particularly, when the specific reference portion is arranged at the position which is farther from the reference portion arranged at the opposite side than from the reference portion arranged at the same end portion side, the specific object  60 S arrives at another reference portion before arriving at the specific reference portion. In this case, even an operation indication on the specific reference portion may is likely to induce an erroneous operation on another reference portion. However, according to the embodiment in which the first reference portion  55 A and the second reference portion  55 B fade out, it is possible to cause the first reference portion  55 A and the second reference portion  55 B to fade out of the game screen when the specific object  60 S passes, and thus the induction of the erroneous operation can be prevented. 
     Further, in the above embodiment, the specific reference portion is displayed on the game region by a difficulty level setting before playing, but the present invention is not limited to this embodiment, and the specific reference portion may be set to the game region when a predetermined condition is satisfied. For example, as the predetermined condition, a specific operation during a game such as a case in which a touch operation is performed in a predetermined direction or at a predetermined velocity may be employed, and an event during a game or another option may be employed. 
     In the above embodiment, an area between the first reference portion  55 A and the first top reference portion  55 TA and an area between the second reference portion  55 B and the second top reference portion  55 TB are set as the object appearance areas CR, but the present invention is not limited to the positions. For example, an area near the center of the game region may be set as the object appearance area CR and may be shared by the reference portions  55 A and  55 B. Further, in the above embodiment, a setting is made such that the object moving toward the second reference portion  55 B side appears in the first object appearance area CR 1 , and the object moving toward the first reference portion  55 A side appears in the second object appearance area CR 2 , but the present invention is not limited to this embodiment. For example, on the contrary, a setting may be made such that the object moving toward the first reference portion  55 A side appears in the first object appearance area CR 1 , and the object moving toward the second reference portion  55 B side appears in the second object appearance area CR 2 . As a result, a difficulty level of the game can be changed. 
     In the above embodiment, when a misoperation is performed on the specific object  60 S, the specific object  60 S disappears after an operation timing elapses, and the next object having the correspondence relation with the specific object  60 S appears in the object appearance area CR, but the present invention is not limited to this embodiment. For example, the present invention is not limited to the specific object  60 S, and when the moving velocity of the object is slower than a predetermined range, the corresponding object may disappear after an operation timing elapses, and a next object having the correspondence relation with the corresponding object may appear in the object appearance area CR. In this case, it is possible to prevent a game from being monotonous, and it is possible to suppress the velocity difference with the moving velocity of the next object that may occur by an addition of the distance to the end portion  52 U or  52 B to the moving distance. Alternatively, the velocity difference between an object that has arrived at the end portion  52 U or  52 B and a next object may be calculated, and when the velocity difference exceeds a predetermined range, the disappearance and the appearance in the object appearance area CR may be actualized. Further, the present invention is not limited to the embodiment in which the disappearance timing of the specific object  60 S is synchronized with the appearance timing of the next object having the correspondence relation with the specific object  60 S, and the disappearance timing and the appearance timing come in one after the other. In other words, the disappearance timing may come before the appearance timing, and the appearance timing may come before the disappearance timing. 
     In the above embodiment, a difference in color is used to distinguish the specific object  60 S from the normal object  60 , but the present invention is not limited to this embodiment. For example, the specific object  60 S may have a shape, a pattern, or the like different from the object  60 . 
     Similarly, in the above embodiment, the moving path along which the object moves toward the next reference portion is decided according to the positional relation between the position of the touch operation and the position of the object, but the decision of the moving path is not limited to the embodiment according to the positional relation. For example, the moving path may be decided according to an operation designating a direction such that the position of the touch operation continuously changes, and the moving velocity may be decided according to the change speed of the continuous change. 
     Further, the above embodiment has been described in connection with the example in which the three paths W extend from one rebounding point R 1  or R 2 , but the number of paths extending from each rebounding point is not limited. Thus, many paths omnidirectionally extending from each rebounding point may be set. Further, many rebounding points may be provided as the rebounding point R 1  or R 2  included in each reference portion  55 A or  55 B. In other words, a plurality of paths may be provided such that an operation indication mark omnidirectionally moves among all positions of each reference portion. Furthermore, many rebounding points may be provided as the rebounding point on both sidewalls  52 R and  52 L of the game region  52 , and many paths may be provided as a path from the rebounding point. Thus, many paths up to the rebounding points and many paths after rebounding can be set. 
     Further, a region (which is assigned to each path) set to each of the objects  60  and  60 S is not limited to the above embodiment. The operation indication mark may be divided into many regions corresponding to many paths provided in the game region. Thus, it is possible to move the operation indication mark along a free path between the reference portions in response to the touch operation. Further, the present invention is not limited to the embodiment in which the operation indication mark is divided into a plurality of regions, and for example, the moving path of the operation indication mark may be decided by comparing the fixed position such as the central position of the operation indication mark with the touch operation position. 
     Similarly, in the above embodiment, the moving path of the specific object  60 S is limited to the two specific paths respectively heading to the left and right top reference portions  55 T, but the present invention is not limited to this embodiment. As far as the velocity, the approach angle, and the like inappropriate to an indication of an operation timing are not caused, various paths and a plurality of paths heading to the left or right top reference portion including a path rebounding from the left or right wall may be employed as a path along which the specific object  60 S moves. A path rebounding from each wall  52 L or  52 R at the front side in a moving direction of an object further than the central position between the first reference portion  55 A and the second reference portion  55 B may be used as an example of the moving path of the specific object  60 S that does not cause the approach angle to be inappropriate while allowing rebounding from the left or right wall. Further, in the embodiment in which the moving path of the object  60  or  60 S is freely selectable, in order to prevent a path inappropriate to an indication of an operation timing from being used as the moving path of the object  60  or  60 S, the sequence processing unit  15  may be configured so as to execute a path correction process routine as an example illustrated in  FIG. 12 . 
       FIG. 12  is a diagram illustrating an example of a flowchart of a path correction process routine. For example, the path correction process of  FIG. 12  may be executed between steps S 3  and S 4  of the sequence process routine of  FIG. 9 , that is, after a path is decided by the path deciding process of step S 3 . When the routine of  FIG. 12  starts, in step S 51 , the control unit  10  first acquires the decided path and an operation timing to be indicated by a target object, and calculates the moving velocity of the object  60  based on the distance of the acquired path and the operation timing. Next, in step S 52 , it is determined whether or not the moving velocity calculated in step S 51  is within a predetermined range. When a positive determination is made in step S 52 , the subsequent process is skipped, and then the current routine ends. In contrast, when a negative determination is made in step S 52 , the process proceeds to step S 53 . In step S 53 , the decided path is corrected to a path in which the moving velocity of the object  60  falls within the predetermined range, and then the current routine ends. Further, when the path is corrected by the path correction process, in the process of step S 4  and subsequent steps of  FIG. 9 , the path corrected by the path correction process is preferably used in the routine of  FIG. 9 . 
     Incidentally, in the routine of  FIG. 12 , it is determined whether or not the moving velocity is within a predetermined range, but the routine of  FIG. 12  may be configured such that the approach angle on the reference portion  55 A,  55 B, or  55 T is calculated as a determination target based on the selected moving path, and then it is determined whether or not the approach angle is within a predetermined range. Further, the routine of  FIG. 12  may be configured such that it is determined whether or not the moving velocity is within a predetermined range, and it is determined whether or not the approach angle is within a predetermined range. Furthermore, the routine of  FIG. 12  may be configured such that up to a path after a misoperation is calculated, and path correction is performed in view of a moving velocity of an object after a misoperation (for example, the velocity of an operation indication mark until arriving at the end portion  52 U or  52 B by a misoperation is compared with the velocity of an operation indication mark to appear next at the arrival position of the end portion  52 U or  52 B, and then the velocity difference is adjusted to fall within a predetermined range). 
     Further, the routine of  FIG. 12  may be applied to an object that has arrived at a reference portion or the like or a next object having a correspondence relation with an object on which an appropriate operation is executed. As a concrete example, a moving path of a next object may be limited to a predetermined path such that the moving velocity of the next object falls within a predetermined range. For example, it is effective when this embodiment is applied to an embodiment in which the specific reference portion is arranged at the position which is farther from the reference portion arranged at the opposite side than from the reference portion arranged at the same end portion side, that is, at the position at which the distance from the reference portion at the opposite side is larger than the distance between the reference portions  55 A and  55 B, particularly, to an embodiment in which the specific object  60 S passing through the specific reference portion does not disappear and moves up to the end portion  52 U or  52 B. In other words, in this embodiment, the specific reference portion is arranged at a distant position, and thus the moving distance of the specific object  60 S is long. For this reason, when a path that is long in a distance by which an object rebounds from the left or right wall twice or more is used as a moving path of a next object, it becomes remarkably fast compared to when a next object appears at another reference portion. Here, when the routine of  FIG. 12  is applied to a next object, the moving path of the next object can be limited to a predetermined path such that the moving velocity of the next object falls within a predetermined range. Thus, a path along which an object moves toward the reference portion at the opposite side which is shortest in the distance from the appearance position, a path along which an object moves toward the opposite side at the velocity falling within the predetermined range while rebounding from the left or right wall, or the like can be used as the moving path of the next object without fixing the moving path of the next object. Further, it is effective in not only this embodiment but also an embodiment in which the distance between each of the reference portions  55 A and  55 B and each of the end portions  52 U and  52 B is large. The control unit  10  functions as a velocity calculating device by executing the routine of  FIG. 12  described above. 
     In the above-described embodiments, the object  60  disappears at the arrival position, and the arrival position serves as the appearance position of the object  60  corresponding to an operation timing indicated by the common object  60 , and thus the object  60  moves as if the object rebounds between the reference portions  55 A and  55 B, but movement of the object  60  is not limited to this embodiment. For example, an embodiment in which an operation indication mark does not disappear at a rebounding point at the arrival upon each arrival but actually rebounds from the rebounding point directly using a common object  60  may be employed. In this case, for example, the reference portion which the operation indication mark moves toward can be indicated by changing a color of the object to a color corresponding to the reference portion to arrive next after rebounding from the rebounding point. 
     In the above embodiment, a rectangular region is used as the game region  52 , but the present invention is not limited to this embodiment. Regions of various shapes such as a polygonal shape or a circular shape may be used as the game region. Further, in the above embodiment, the two reference portions  55 A and  55 B corresponding to both ends of the game region  52  in the longitudinal direction are provided, but the number of reference portions is not limited to two. For example, a region around which three or more reference portions are set to allow three or more players to play a game may be used as the game region. 
     In the above embodiment, the control unit  10  serving as the evaluating device evaluates an operation timing of a touch operation by comparing the operation timing of the touch operation with an operation timing described in the sequence data, but the control unit  10  need not necessarily have the function of the evaluating device. In this case, a game machine of a match-up type in which an operation is made in tune with a rhythm of music while inducing an opponent player to make a mistake can be actualized. 
     In the above-described embodiments, the touch panel is used as the input device, but the input device is not limited to this embodiment. For example, as far as a plurality of operating units are included, there may be used input devices having various configurations such as a controller including a plurality of push buttons as an operating unit or a plurality of controllers including one button as an operating unit. For example, when a direction selection button and an operation decision button are provided in an input device, the operation decision button may be provided so as to correspond to each reference portion, and a moving path of an operation indication mark used for movement to a next reference portion may be selected by the direction selection button. 
     In the above-described embodiments, only one game machine  1  is illustrated in  FIG. 1 , but a plurality of game machines  1  may be connected to share game content with each other. For example, two game machines  1  connected to share game content may be arranged in parallel in the traverse direction. Further, for example, two game machines  1  connected to share game content may be arranged such that back surfaces thereof encounter each other, that is, two game machines may be arranged in a back-to-back manner. In this case, a game is executed in a state in which the players are positioned to face each other, each player&#39;s feeling that they are playing against each other can be further improved. Further, in the above-described embodiments, the monitor  3  is arranged to be inclined to the player P side, but the present invention is not limited to this example. For example, the monitor may be arranged to be almost level. In this case, two players can use one monitor, and two players can use the first reference portion and the second reference portion as a plurality of operating units through a common monitor and a common touch panel. 
     In the above-described embodiments, a game of a match-up type is executed by the game machine  1 , but a game executed by the game machine  1  is not limited to a game of a match-up type. For example, a game of the game machine  1  may be executed such that only the first reference portion  55 A is set to correspond to an operating unit, but the second reference portion  55 B is arranged to simply function as a wall that causes an operation indication mark to rebound. And, a game may be executed such that an operation indication mark rebounds from the second reference portion  55 B and both walls  52 L and  52 R, and moves so as to arrive at only the first reference portion  55 A or the first reference portion  55 A and the second reference portion  55 B at a timing described in the sequence data. Furthermore, in this game, an operation indication mark is configured so as to rebound from the upper end portion  52 U, and in this case, a display of the second reference portion  55 B may be omitted. In this case, a game, in which a difficulty level of a game can be variously changed, which can be executed by a single player, can be actualized. Further, in this case, the first reference portion  55 A and the second reference portion  55 B, each wall, or the like function as a plurality of reference portions of the present invention. 
     In the above-described embodiments, the game machine  1  is configured as a music game machine in which music is reproduced, and an operation indication mark moves toward a reference portion based on a played time of the music. However, the invention is not limited to this example. The game machine  1  can execute various kinds of games as far as an operation timing is indicated through a video. Furthermore, the game system of the invention may be actualized in appropriate embodiments such as a game machine for business use installed in commercial facility, a stationary game machine for home use, a portable game machine, or a game system actualized using a network.