So, I played it again and here are some remarks:
- it would be cool to play the game in full screen
- gamepad support would be awesome. You basically support every action already, but not the aiming
- sprinting should be using less stamina or the walking speed should be little higher
- There were spots where I got stuck, because it looked like there were walls where there were not (I attach a screenshot)
- I caused a bug by attacking the first armoured enemy, after he just vanished and the music started to be bugge (see video)
I hope this helps! I think you did a great job with that game.