Patent ID: 8226480

Claim:
A game apparatus comprising: a controller that includes an acceleration sensor for detecting one or more accelerations in one or more axial directions and outputs a plurality of operation signals including one or more acceleration signals outputted from the acceleration sensor, the one or more acceleration signals indicating one or more accelerations with respect to the one or more axial directions; and a game executing section that includes at least functions of executing a game program by using the plurality of operation signals as input signals, displaying an image object on a display screen of an image display apparatus based on the result of execution, and controlling a movement of the image object relative to a home position predetermined on the display screen as a starting point of the movement of the image object according to an output from the acceleration sensor for detecting the one or more accelerations in the one or more axial directions as outputted from the controller, wherein the game executing section determines based on a first half wave signal of the acceleration signal whether or not the acceleration signal is appropriate for moving the image object, controls the display screen to move the image object away from the home position based only on a second half wave signal of the acceleration signal occurring subsequent to the first half wave signal if it is determined that the acceleration signal is appropriate for moving the image object, and controls the display screen to move the image object back toward the home position when the second half wave signal reaches a peak.