I am working on two games currently. They are both halfway between prototype and MVP. One is a fun, happy-feeling twitch-based arcade game; the other is a slower RPG-themed memory game.
They both have tracks already that I am intending to swap out; the existing tracks give a sense of the mood I was thinking would be appropriate for the game.
I can share the playable versions of each game with or without the existing tracks, to see if you would be interested in joining for either of them as the music producer.