This game is structured like most rhythm games, where any song previously passed can be played for a higher score. In this game new songs are unlocked in groups when easier songs are completed. The newly unlocked songs can be completed in any order, but all songs in a group must be completed before the next set is unlocked.
An idiosyncrasy is the two last songs. They must be played and beaten one after another. If they are not both passed, they have to be played through again, regardless of whether the first song was passed. After they are both passed, they can be selected as single songs to improve scores.
After all the songs are beat on normal difficulty, the Hard difficulty is unlocked. Beating the Hard difficulty unlocks the "Insane" difficulty. On each difficulty, the time the timing circles appear decreases. On "Insane" difficulty, the button size decreases as well.
- Hits -
Hits are the circles that you must follow in a specific numbered order.
- Tracks -
Tracks are paths that you must follow with you your stylus.
- Spinners -
Spinners are the circles that you must spin in order to fill up the meter.
If a song is passed, a grade letter is assigned based on performance of the song. They are as follows:
If a D rank is achieved, the ending to the story of the particular song is different.