Not entertaining
First: Why make a two-player game? Do most people surfing the internet for games do it as a couple? This should have one computer-controlled ship which could be switched to two-player if needed. Second: For two-player controls, one set should be on -one- side of the keyboard, and the other set on the -opposite- side. I'd have thought that would be obvious! Third: The walls are too big, and there's no way to get more ammo. In an actual two-player, it'd be almost impossible to kill your opponent in the amount of time given with the ammo provided. I tried it with the other guy just sitting there, and I barely nailed him -- no bullets left and less than 300 seconds left. Bullets just don't do enough damage.
The only thing worth seeing here is the graphics, which are only okay. Get it together, man.