I REALLY liked the idea and the core gameplay loop, it is just missing a little feedback and needs some UI touch-ups. Plus, all of the models look amazing! I liked the big boss at the end that was great too. I loved the creativity in the weapons the player can get.
I feel like the game would feel very different with some simple UI changes and adding menu: changing sensitivity (had to lower my dpi); changing audio volume (the ding is great at the end of the levels but it kind of hurts my ears at normal volume); showing hp differently, etc. Also I don't understand what the symbol near the top right is, it looks like a staircase but I never saw it move or anything, but I wasn't paying attention to it while fighting.
One last thing, the projectiles that the player throws do not go to the crosshair which is a little annoying.
Overall I actually had a great time, but having no menu and too simple of a UI, and being unable to change settings took away from the game a lot. I feel like that would be something easily fixed if you felt like it after, though.