This is very well done! I played through the entire thing, the bosses were very well telegraphed which cannot be said for most bosses ive fought in other games so great work on that! The story was cute, I like the skeleton character and the design changing of the mc as I got more abilities was a nice touch. The artwork was solid overall. I think if you had like an atmospheric fog overlay in some areas that would be really cool. There was this one part in the bottom left area in the central room on top of the ground with the giant face where my jumping got really messed up so you may want to look at that. Great work!