Patent ID: 8128468

Claim:
A game device for proceeding with a game by inputting an operation relating to an object displayed in a screen, comprising: a user interface control unit configured to control a graphic user interface which is arranged on the screen and used to display information about the game and input the operation to the game; an object control unit configured to change position coordinates of the object in a 3D space in accordance with stroke data which is input on the basis of the operation of the graphic user interface, and a target power determination unit indicates a target value of a magnitude of impact by means of a mark on a gauge in the graphic user interface, wherein the graphic user interface indicates the magnitude of impact to be input by displaying a graphic which varies with time in order to accept the magnitude of impact, the graphic is the gauge which indicates the magnitude of impact by length, the gauge is partitioned into a plurality of areas, the target power determination unit indicates a slider which moves along the longitudinal direction of the gauge, a product of the change amount of the graphic and a scale factor is input through the graphic user interface as the magnitude of impact, and stored in the stroke data, and the value of the scale factor and display type of the gauge are switched in steps depending upon which of the areas on the gauge the slider is located in.