An object of the present invention is to realize a baseball game in an environment that is difficult to achieve in the case of game-dedicated devices and the joysticks used in such devices. When the mouse 22 is moved toward region A, a straight ball is selected as the ball type. When the mouse 22 is moved toward region C, a screwball is selected. When the mouse 22 is moved toward region D, a sinker is selected. When the mouse 22 is moved toward region E, a split-fingered ball is selected. When the mouse 22 is moved toward region G, a slider is selected.