Nice one! Especially like the rotor trick. First time I crossed it, I thought "wait, why did I take that trouble?". Then I found the 1-way -you know what-. Also great!
Amazing level, although really difficult. In my opinion, for last step you should let the ball physically touch B (this remote effect documented by @meko is really no intuitive). Anyway, the level is a 5 stars one. Thanks!
I'm confused how to use that rotor... Spoiler I was able to throw B to the other side directly, but then I skipped the middle part.
@richardfu_ - Yeah, that's not intended. Spoiler: Rotor Hint It's not about the rotor. Spoiler: What does that mean? Yes, B needs to get on the rotor, but then stop thinking about it as a rotor. Spoiler: Rotor Hint #2 To make it past stage one, make like a kid and roll. Spoiler: What does that mean? (warning near solution) To roll down a hill, kids lie down sideways and roll. Imagine if B could be made to do the same down that ramp.
@richardfu_ Yes maybe it was my mistake. not draw the line. Spoiler You make B to the other side by means throwing with rotor? I mean, the function of the rotor is to break through.
