I did! I would rate the first three levels as easy, and the last two (snowtop, forest) as somewhat challenging. If any more levels were to be added, I think they could be much harder. It looks like you designed a lot of these levels to make it impossible for the player to "cheat", but I see that as an invitation to find my own shortcuts.
It's such a satisfying physics engine; you've got something really cool here!
