Pop'n Music Animelo is a game in the Pop'n Music series of video games from Konami. This version is comprised largely of anime and television show songs (hence the games sub-title "animation melody").
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.