Re-think your design choices
First off: A good game. Not a great game, not a bad game, but good. It was okay.
The control thing may want to be re-thought, moving where you are shooting may be new and under used, that doesn't make it good though.
If you do want to use the shoot-where-you-move mechanic, make the rest of the game fit it. Don't have enemies that home in on you, you'll wind up penning in the player. Always leave a way out. Powerups may want to appear more often.
That aside though, nicely done. Looked good, sounded good.