Controls are sharp, and it looks and plays great! I played it in Wine on Ubuntu, which might explain some of my technical difficulties - after dying, I found that I needed to esc to the main menue and choose new game - there was no respawn mechanic.
I will admit, i couldnt even beat level 1 :(. It's pretty hard! But I love how snappy it feels - usually fps platformers are really floaty, but this has a great chunky feel. Nice work!