Don't have time for any review today, but since someone brought it up: to kill the boss you need to stay in the air for the most part. Just tap your thruster to keep yourself at head level and shoot for as long as possible. The big guy'll probably fire his gun long before you exhaust your burn. When he does fire the gun, stand just in front of him, then sprint run to his other side after he fires (remember the shots track you as they head down!). Wash, rinse, repeat. I beat him my first try.
Good graphics, nice soundtrack and sound F/X. And gameplay was pretty good (consider a wider variety of enemies and maybe another boss...these are merely suggestions for future submissions.).
Again, nice game man. Keep it up!