A game system includes a game apparatus and a controller, and the controller is furnished with an acceleration sensor. For example, a player performs a boxing game according to an acceleration input by throwing a hook or straight punch while holding the controller. When it is determined that an acceleration input is started, it is assumed that the kind is a straight although the kind of the input has not been identified yet, and a drawing of a glove object moving along a path of a straight is started. When it is determined that the kind is a hook on the basis of the acceleration acquired thereafter, the glove object moving along a hook path is drawn.