Uh, I see what you are going for, but I think you used way to many assets with different styles which make the looks uncanny and very hard to read.
Your level design is very BIG try to make the areas you can move around smaller - if you stay in the center of a room and can t see any boarders, you are prone to disorientation and it feels empty.
When you need Visual assets try to stick to one asset pack or one style.
Overall the gameplay - character controller is solid and I had no bugs, the bosses attack a little to fast but that makes it difficulty not bad. Some of the monsters do have hit flashes which is nice, other do not have that (like the vampires) and thats hard to read if they got hit.
nice submission !