The gang at Boing Boing recently ran a competition, asking for devs to submit quick little games based on, in or around music. And not just any music. Chiptune music.
Well the finalists have been selected, and you can now play those finalists over on their site. Don't go in expecting meaty, polished product; these are quick little games made for a competition, not retail products. But if you go in expecting some neat ideas around some interesting music, you'll be just fine!
My favourite is Knifetank. It's a tank. With KNIVES.