Really nice looking game! I made a guitar game. The main thing I would say is to make the tutorial shorter (I just want to start playing fast straight away, even if I can't hit the notes well yet). I think it's very well polished though.
I'll try to rate you when I can, my project was just submitted late because it took too long to build it. The game is right here if it's not up on the jam yet "https://blakeb1.itch.io/bonkos-nightmare"