GREAT. (srry caps lol)
i dont see why everyone is saying this game is hard its not that hard just fast paced. My technique is to constantly hold down two arrow keys and shoot ahead of me. the bullets run behind youlike mines and hit he enemies. Although i did die once or twice :P
some sugestions:
dont raise how many waves their are per lvl. Its hard as it is.
more power ups!
-KFCman