Great game!
There are one thing that you might want to fix up: The turret is buggy. It shoots all of the time and hits nothing. This makes the game much harder. And to all of you people that say "once you get the helpers, they do everything for you." That is slightly true, but I found that a great time to stock up on ammo, and stuff like that. Also, to those who have trouble beating many of the levels: Search the whole base before you move on.
Fix up some things and this could be a top notch game!
9/10
5/5