The art was very charming! Most things that I would mention have already been mentioned, but here are a few things I felt could use some minor tweaks:
When I first started it, I felt the jump was a bit to floaty / high, but the hitboxes on the skeletons are rather bit, so it makes sense. Still feels a bit off.
There were times where I died and it just felt off. I was confused on where / how I was hit, which means taking damage could use a bit more feedback.
Overall it was a fun experience, good work! :)