Pop'n Music 13: Carnival includes more than 500 songs, of which more than 40 are brand new.
Gameplay is identical to other games in the series. The Pop'n Music controller features 9 buttons organised in two rows. After you select a song, the screen will show 9 coloured "pop notes" descending towards the timing bar. You must watch the screen, and hit the corresponding coloured buttons in time with the music and the notes on the screen.