Hey, I got to play this as a judge at Kinematifest at Webster University! I had a great time swinging around and blasting spider bots. I did feel they were a little slow and unthreatening, though, and jumping around was a little clunky. I got stuck on some of the boxes trying to hop around at first, and I noticed your control instructions here on Itch.io don't mention that the 'F' key helps you pick up the new weapon. A little more animation or robot hands moving with the weapon attacks would go a long way.
The idea is really freakin' cool though! I was a little confused by the sheet music healthbar at first, and I think it would be better soundwise if the music sound effects played changed more to match the chords and notes shown on screen. I also wasn't quite sure what the purpose of changing notes was, but I imagine it could be used to some neat effect and gameplay variation. Excellent work for a student project, I could definitely see this growing into a full commercial game.