I played your game and here's my feedback...
- good start screen
- i like the procedural generated music
- a bit text heavy
- i like the intro story and images
- nice 3d rayasting system
- the games runs really wel
- seems like a bug of objects drawing through walls
- the shooting and stuff all works well
- some slight textures on the wall and floor could help
- nice mini map
nice work overall! i think one of the biggest issues is walls not blocking things behind them, if you can get that fixed it would be a big boost. Also you might try swapping in some premade music to help build the atmosphere.