I seriously enjoy this game. I can't find anything wrong with this game 5/5. Fast paced, lot's of explosions, responsive controls, upgrades, destructable environment, fun weapons, varied enemies, I friggin' love it...
FUCKING HORRIBLE!!!! Weapons out of control, levels ridiculous, SLOW, controls don't work correctly all the time, elevator levels stupid as hell, only two guns is gay, weapon accuracy does not exist, etc...
I think it's a great game, finished almost all of the levels in a fairly short amount of time. You must make the holes more visible in some way though.