I wo the level where you have to shoot her with the metal ball but then the bullet went in an arc and hit her in the head. so I won the level then she died and broke the laws of physics by falling through a wall.
I like the idea for a sell button but I noticed that the engineer doesn't have anything for his spacebar ability so maybe the sell button could be that.
 "Epic Combo!"){kind=icon}
 "Save Toshi"){kind=icon}
 "Adam and Eve"){kind=icon}
 "Bunny Flags"){kind=icon}