Fairly good for a first GWJ! Very impressive. I agree with others that said the controls were a little unresponsive sort of - you may want to read my recent dev log on Impish Winze, which is a Metroidvania my team and I made for GWJ 54; I had similar types of control issues, but we fixed it right after the jam ended with some interesting code. That said, the music was a tad repetitive, but my favorite part of it was the absolute squash and expand you got on the character sprite when jumping/landing. Very cool stuff! I wish I'd had a controller to test this out with, because I imagine I'd have done better! Overall, well done!