Very smooth controls and it feels natural to move in time to the beat. I do think that the game would benefit from a failure state though, feels wrong that the enemies can reach you and and there are no real consequences. That said, very cool game.
This is a jam project, and I didn't want to make a too difficult game, so I just give score penalty instead of failure states. I think it's better than forcing players to play the whole song all over again.