A rhythm rogue-like. The following video is quite self-explanatory.
Oh, that music... Think I'll have to download it again to my PS4 and PSVita... But maybe I'll wait for Amplified to be released.
The game gets fairly difficult, though. You unlock several characters and each of them has something unique to them (e.g. faster rhythm, skip the occasional beat - which always fucks with me -, etc.).
Never managed to beat the game with certain characters.
People should buy it. One of the most creative games I've played in years and so much fun. And did I mention the music?