The game was really fun to play. I really like it. Only thing I have to add is that maybe jump is better on w/up arrow, I had hard time coordinating jumps and attacks. Other then that it is a really great game!
It was fun, maybe you could've added different colored planets after certain number of score and lose after some number of asteroids, but overall it was fun. I also found an exploit in your game, if you hold the mouse down you can wait until there is trash above the claw and then release.