Art and atmosphere here is really cool and it feels even better with the soundtrack. Also good job with the animations.
There is a lot of shooting, but it's not challenging enough, so at some point shooting monsters feels like something annoying. I think the game needs something to spice up fighting, like different types of monsters, new aiming mechanics or limited ammo.
I like color changing feature, it's like character customization, but you customize the whole game instead :D.
Overall, the game has very good aesthetics and sound design. I really enjoyed playing it!