A music-oriented game machine with a feature to increase a feeling of competitiveness between players. Based on an evaluation of a performance of the first and second players based on their steps, the number of times step timing is presented as guidance is varied. Specifically, while reference arrows (46, 48) are displayed, a plurality of timing guidance arrows (50, 62) approaching the reference arrows (46, 48) are also displayed on a game screen image (40). As a result, guidance as to where step timing is arriving is shown to the player. Then, a speed at which the reference arrows (46, 48) approach the timing guidance arrows (50, 62), respectively, is changed from a default speed to speeds of half, twice, and three-times the default speed based on the result of evaluation on the respective player's stepping performances, to thereby change the guidance level.