Nice work! I like how the walls around the planets breaks little by little :D
I found the way the ship moves a bit confusing. Several time, I made it disappear of my screen ^^' But I mean, that's all the difficulty of the game: keeping track of your ship AND the meteors.
The music is nice, the sound when you shoot as well!
The only bad point I really see is how short one try of your game is. So maybe, to improve this point, you could make the difficulty increase more gradually and add a repair bonus to pick up every now and then?
Thank you for this really cool game! Here is my best score so far! :D