A touch panel (13) is mounted on a second LCD (12). If the player touch-operates the touch panel (13) so as to touch on an offense button (OB), the symbolized representation of any offense athlete among a plurality of player objects composing the player's team becomes relatively large. Thus, in a game where the action or settings of a game object image is changed by touch-operating the game object image, the image of a game object that is highly frequently operated in situations similar to the current situation is enlarged, thereby facilitating touch-operation.