Oh man, where do I start.
For starters, weapons fit perfectly into the game and they sound very meaty and impactful. Also I like that every weapon has a primary and a secondary fire. The overall theme of the game is very unique and eerie and the background story that you’ve written in the description of the game fits perfectly into a retro FPS game. You can make so many different, grotesque, unique enemies with this "flesh combined with machinery" theme. I played these 2 levels so much: I found the hidden RPG in the first level, know pickup and enemy placement, mastered the revolver alt-fire, and much much more. I’ve seen screenshots of future levels on your twitter and i can’t wait to play them. Every enemy is very special and easily identifiable. You could add small annoying enemies and flying enemies in the future to mix up the gameplay. There is room for expanding in the future. Overall an extremely well-made game and I am sure that if you keep working on it, it will become one of the finest throwback boomer shooters. You have a guaranteed purchase from me :D
Now there are a few bugs I found:
1. When Fat guys launch rockets they collide with them and deal damage to themselves
2. There is a pile of boxes near the first Spiderpope in Blood Conversion that you can walk through
3. There is a small grey box on the place where you spawn in each map