Nice game, I liked the enemies attacking from every direction but not in a stupid way that gives you no chance to fight.
The map could have benefited from some depth and obvious edges, I would have liked the E,Q buttons to circle through the weapons instead of hitting the end of the weapon list then clicking the other button to go back.
The sniper is useless, it doesn't do any obvious extra damage or go through enemies and has a very low rate of fire.
The shotgun and the "piercing" rocket launcher are the best, they provide good damage and affect many enemies.