I had a freaking blast with this game. The compression on the audio and the feeling of the movement gave me some serious Build engine vibes. Cracking stuff.
My criticisms would be that the sensitivity is waaaaaay too high along with the volume of the barrel explosions (made me jump out of my skin every time i accidentally shot one mid circle strafe). I'd also say you take far too much damage from falling and the damn bees, but maybe i'm just not hardcore enough.
Loved it.