When the operation of the cursor (105: FIG. 12) is adapted to the guide (G1-G4, g1-g5: FIG. 12), the dance object (106: FIG. 12) and the background are selected according to the operation direction of the cursor. The display of (110: FIG. 12) is controlled. An operation article (150: FIG. 1) intermittently irradiated with infrared light by a stroboscope is photographed by an imaging unit (13: FIG. 1), and the position of the operation article on the screen (91: FIG. 1) is obtained. This is the coordinates of the cursor. Simultaneously with the start of the game, the music is automatically played regardless of the player (94: FIG. 1).
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