I've tested the game and it's nice. But there was a huge issue with collision. You could partly go though walls, which was very annoying (with partly I meen that you're stoped by a wall, but when you are, you are so close to it that you can see though it). If there was an enemy on the other side of the wall, I just had to walk up to it so the bug appeared and then kill it.
The weapons where a bit static (when reloading it would be nice with some sort of reloading effect with them, if you know what I meen). And some of the weapons had a very fast reload-time.
Anyway, very nice game. Even if it's not perfect, I like it somehow. An idea would be that you could evolve it further to cover a number of missions (five to ten or even more, if you like) following a storyline. Than would really be nice. Good work

.
Ohh, and the menu is awsome

.