Cool level idea! I like it. Love the design and symmetry. Spoiler As far as I understand, R is not needed for the game. He's a sham, a hoax. Although I figured out how to win with R. It's real, but one wedge gets in the way. If you remove one wedge, you can win R.
Cool design, but sometimes the balls miss the holes and roll off the game. Spoiler Also if you get the top star with the ball then it can't be used for L, at least I couldn't see a way. The blue bot gets stuck sometimes in the water. He stops in the middle and turns around, other times he walks to the other side then turns round instead of going up. I wonder if it's related to this forum thread where bots won't walk all the way across clear paths? https://mekoramaforum.com/threads/bot-walk-bug.1538/ Note my "Hesitant Bot" card in the above link.
at first I used B. but because L move was weird, so I used L. but L was able to finish and win.. thanks @Chris Hester
My L also had the same weird walking behaviour as mentioned by @Chris Hester The design is nice and the ball near win was difficult to control as holding a slanting rotor will somehow cause the ball to drift sideways.