The wheel was genius, awesome addition :D
It took me a few tries before I figured out the last level, as I didn't expect the bottom platform to stay in place. But hey, it worked :D
I also had a bug once where I think an infinite loop caused the whole game and browserpage to freeze. I think it was the same level as in your screenshot, where I just dropped the big boulder and stood on that ledge, but I got stuck on the corner when dropping down, I think.
Overall, pretty solid game :D good job!