Really really love the art, well done in that regard. I also like that there's an upgrade system, it hit right when the mechanic was feeling stale for me, so getting the sunglasses was nice :)
For constructive criticism, honestly the art is so good that it kind of overshadows the UI. I also think some of the things, e.g. the monster, are so well animated that it kind of makes things that aren't animated stick out: I think the shooting and projectiles could use more juice. Gameplay wise, there are some gaps that you can't jump out of forwards which I get is a design choice, but being that you have to turn around a lot it can feel bad getting trapped with no way out