The idea of a 3D hidden object game is pretty neat, but I think the idea of using the rocks to move falls a little flat. I had a lot of trouble figuring out of the control and ended up drifting away every time. I think pulling yourself to the rocks or something of the sort would have been more intuitive. Instead of looking for objects, I ended up just constantly struggling to not float into space, and often the game would freeze temporarily and when it resumed I was already way off.
I like the idea, but the mechanical execution didn't end up really working for me.