Wow, it�s a very interesting game dude!
I like it! It�s fresh, simple and addictive!
The only thing I�d change is that, the missile launching key (side arrow keys) it�s not the best choice I think, cuz you can�t control that as you want or without moving from place. I�d add another key for firing the arms, but the rest is simply clever and nice.
Great work man!