This would be a great game if the screen were a little bigger. Unfortunately, the size of the screen combined with the size of the planet and the speed of the asteroids makes the game kind of impractically difficult.
This game MIGHT be playable if it wasn't so goddamn laggy, but once the screen fills up with creeps, the controls stop responding until you're dead. Hey designer! Here's an idea: put a quality toggle in your game like all the other game designers who actually care about who they're making their games for. Douche.