Environment Protector

I know this is pretty much a rip off of the shootorial game (i even used its background?.), but this is my first try at creating a flash game and i have encountered some bugs which i would like someone to help me with. (eg for some reason i always one shot the bosses, not sure what?s wrong with my code) By the way, the theme of the game is that you are the hero that shoots up co2 enemies and tries to save global warming.