Thanks so much dude! I'm glad you were able to enjoy and push through the final levels, I certainly didn't make them easy. I was worried the kinda disparate graphics styles along with the rhythmic beats wouldn't manage to mesh, but hearing they worked for you is really great to hear.
Fair comment about the hit boxes though. It was tough to fine tune because the hit box for killing an enemy is the same one they use to kill you, so they had to be both fair to hit while also not too large to kill the player from far away. If I could go back I would likely separate those functions into two hit boxes to resolve it. And thanks for the note about the clipping, that I can hopefully remedy soon.
I like your idea about it being set levels though, the ones in the game were certainly really fun to build. And it would help to address the difficulty curve, which I did make quite steep.
Thanks for the feedback again!