Really nice minigame game! I loved the art and the audio. I think you were supposed to keep the beat, but I just jammed the press button and that worked as well. Some more penalty for not keeping the beat could make sense there? Or extra points if you are on beat maybe. But otherwise I really liked the game!
We made a warioware-like game with lots of minigames, so feel free to check ours out as well :)