It's good to see a raycaster, especially one coded from scratch in C.
I had a lot of trouble with the game, the lack of feedback on the weapons made it difficult to see exactly what I had to do (freeze then fire) without experimentation, and the lack of feedback on the enemies made it extremely easy for them to just come out of nowhere and take off chunks of my health.
I also ended up entering a room with only one door and couldn't exit, so I didn't get to play much further. I might give this another attempt, but as it is, sorry, not entirely my thing.
Nicely done on making your own raycaster, though!