One MAJOR problem
I gave it a one because the only good thing was the voices when you got the power ups.
The BIGGEST problem: THE BULLETS MOVE IN THE DIRECTION THAT THE ENEMIES MOVE. That made the game waaaay more frustrating than it had to be.
You would go to move out of the way of a bullet and then the enemy would move the same way you did (almost as if programed to crash into you) and the bullet would move sideways right along with them!