i would give it a 4/10. it lacked detail like others said; but that's not all. the space is way too small and there is no moving around. and what's the point in putting a sniper when there is no good space to snipe, you would be better with a shotgun and if someone stays by the door of the enemy's base with a shotgun then it's just spawn killing. If the place was bigger it might be worth playing. Also the minigun is best for big areas and maps that have lots of room and the place isn't packed.
lol, you said we should have a shotgun, then said it was a bad idea.