The game looks really good and the character feels great to move around and play with!
Some of the enemy encounters could have been a little bit better, especially as they can combo you really fast, so I ended up rushing past them mostly, but enemies themselves were pretty good too!
I think the only real issues is that it's pretty linear (I like the idea of having a big vertical room as a hub, but you end up going through it in one way), and it doesn't really fit the theme super well. You said you applicated the theme through the art style, but despite being low poly and pixel art, it is very busy looking (which is not a flaw! I like it!, just doesn't fit the theme in that way).