@Meko Guy Thanks for the comments. I have added hints for the final R move. My intention of this level was to introduce these moves to the new players as I also just came across them not long ago. It's ok for me if they just skipped this level but I do hope they learnt/get to know these moves with the help of video.
@mastersifu - One thing I like to do in some of my levels, is show the move to the player without them doing anything like you did at the start here, when R falls off due to the wedge. Now, it's up to the player to figure out the next one. Something like that can work for your new moves or non-intuitive moves, like the house pass thru.
... the moves are unique but unstable at many spots. unfortunately I failed many times to make B ride on R according to video, bcz when B walk on top, the ball inside house will be pushed. so i cant perform R become bridge for B. instead i use autopilot on long slider, to make B go ontop of R.