Press the green flag to listen! If it goes off beat then turn on Turbo mode (shift click green flag) There's a forever loop for colors but not for the music so press the flag again to listen again. This took a while but was fun to make!
Partially based on this sheet music: https://musescore.com/user/29053970/scores/5518228 by kyoko_ I made the art using a tool called Piskel online.