I dropped a star for the hidden. You didn't need to have the hidden as the level was nice without it - you could have had all the same elements but show more of the mechanisms so one can figure them out. I used Mekostudio to have a peak inside as I couldn't see why the lower one wasn't moving all the way. R wasn't needed in my solution.
I liked the fact that an initial trap , later becomes a helpful push. But R seems to have no part in the gameplay.
