Really nice game man! I loved the art. I think the idea is really cool and makes the player make decisions about which planet to go after.
Suggestion: I think it would be better to select the direction you want to go, then hold down the mouse and release when you want to return. This would solve the main problem I had which was if I clicked just slightly too far or not far enough I would either waste a bunch of time I didnt intend too or not hit the planet I intended too respectively.
Play my game if you get a chance!