Bit. Trip Beat

Pong with music. These emergent games are always great about having catchy music but they never have a way to scale back the difficulty. This is a bias in me when it comes to this genre, something I expect because I think being able to enjoy the music in these games is the real key to the experience. As a consequence, not being able to curb the difficulty or even turn the difficulty off makes the game suffer.

It's about the music, man.