Thanks a lot for the feedback! I had to rush everything, so I'm also truly sorry for the clunky boss hahah.
Ooh I would definitely appreciate an advice as well! Thanks again for the compliment and your input!!
I think the biggest thing I'd point out is the camera/viewport - when I was playing I noticed that it followed the player so closely I couldn't see enemies below me when I jumped. Maybe zoom it out a little or make sure you can see both enemies and player at once within the camera view. (The movement was nice, though! Otherwise, a very smooth camera.)
I also noticed a lot of jittering/switching sprites, which sometimes interfered with jumps and movement - you can prevent this with state machines, so my advice would be to do some research on those to avoid this popping up next time! It can really hurt any kind of precise movement, which you generally need in platformers.