I could play it unironically, not only for rating it. I made it till Stage 3 and got a little upset I had to start all over. The Robots with the shotguns are a challenge. I liked your game, it reminded me of old PC games like doom or quake.
It is fun and straight to the point. Loved the mechanic of gathering parts and putting them in different parts of your body and how different parts give different behaviour.