Hey, I really like the game! Nice, simple but effective graphics. Levels build in complexity as you progress, which is good. It might be good to add a space-like background to the levels with stars or perhaps if you're on a planet, it could be a planet surface background. The music gets a little repetitive, but it's a catchy tune so it's not so much of an issue. Overall - a tight, fun experience!
I'd appreciate if you could check mine out as well!