Yo, this was a super cool entry! I'd been looking forward to it from the beginning and all throughout your progress updates.
There's a lot of good things to say here! The game is superb. No bugs that I noticed, solid gameplay, cool environments, and the variety you put in the art really shines. It makes the environments look distinct, and keyly, like Trinity during Vol. 3. I'm a huge fan.
The additional BGMs, and updates improved the game significantly. I like knowing when I got hit, when the enemies fire, when I fire, and the fleshy punching and breaking noises are cool. I only wish you gave the dying Arius students some sort of death rattle, but maybe that'd be too much. Maybe like a random crit noise?
My only criticisms are minor. Obviously the difficulty is necessarily quite low since you can just mow through everyone, but with that said, the walls should be a little higher because I can cheese a few mobs over walls. Then the punch and gun animations should probably be a little lower because it looks off seeing them in the middle left. It would also help the punch look more natural.
Spectacular job overall, dude. Be very proud of your work!