Oh my god. You expect us, people that want to play FREE flash games, would pay for this crap? Completely un-original, music is horrid, and frankly... It's too short. 1/5 Absolutely disappointing.
To get the Minigun, you have to blow a hole in the first wall you come across in lvl 934, and then you have to use your bow to shoot the little minion, which is holding a key, in which there is a chest at the end of the cave. Open it, and you get the minigun. It pwns! :P