My original plan was to add music to a past jam game, but I have this little idea for a platformer that feels easy enough to explore. It will be pretty straightforward mechanics-wise, possibly quite hard, and as the gif suggests it will be synchronized to the music.
Good news is it took under two hours to get the basics in place with Unity. It's surprising that not many games I've seen explore that kind of stuff… The closest that comes to mind is the "140" indie game, otherwise I haven't seen it in jams that much.
The gif is only an early test so possibly not representative. I'm not 100% sure where this will end, but I have in mind some danceclub-like atmosphere with a heavy electro track on top, and difficult platforming where you find gaps between constantly moving shapes to try and stay alive. Let's see what I can get!