M. Night Shyamalan twist. They are all criminals (because of the orange jump suits) who crash-landed the ship they stole in a prison break. The aliens are just the alien authorities attempting to bring them to justice.
There are far too many problems that need fixing. To name a few: I've had a few occasions where the bugs kept fighting after they were dead. I have had to re-buy some items I have already boughten. The stastics seem far off from what they are.
Map the game to the keyboard as well. It will be easier for the player than moving their mouse all over the screen. Otherwise I think it is a pretty good puzzle game. 4/5
Capt. Lizard: There is the Gun Bot, shoot him!
Private: Okay. (aims)
Capt.: Woah! Woah! Woah! Wait a second, you better not be aiming to the right. The only way to fire a bazooka is to the left.