Nice idea with the orbital rocks. Also I like the idea that the player has to search for the rock he just bought.
But it would be also good if the player could heal. It seems like there are boxes all over the place. Would be nice if I could destroy them and have a chance that an heart will drop.
While I liked the music in the beginning it was too repetive over time. I think something more decent would be better.
But overall a nice idea and the game kept me playing for some rounds :-). Wanted to turn myself into Saturn but somehow failed ^^