I gave up as your level wasn't stable. The balls would drift and R either wouldn't pass by as the ball wasn't aligned or R would walk onto the moving ball and become unstable. After 2 attempts which was very slow, I had enough and wasn't going to hope to be luckier on my third. Having ball rests, a wedge to anchor the ball would have made the level stable.
I found it also enjoyable, though I can confirm there was some ball drift on my first attempt that prevented the final steps, as addressed by @Meko Guy in his review.
