A game apparatus includes an LCD, and a game screen is displayed on the LCD. A touch panel is provided on the LCD. The game screen presents a marker image so as to be variable in position in time with performance of music, and also presents a timer circle image for indicating touch timing for the marker image. A player needs to touch a marker image to be touched with precise timing, listening to the music or watching the timer circle image. The player's touch is evaluated on the basis of the touch timing and the touch position. If the touch is evaluated as a failure, the game screen is shaken.