Priority

Timing matters, but not tight-timing. B has to miss pillar R once.

Spoiler: Sliders

Sliders along with B are useful to unlock pillar R if it's stuck

Spoiler: Video solution

Very enjoyable. My win involved B holding his breath.

Spoiler: Alternative

At 1:43 i placed B on the ball that is then moved to the other side. I then pushed B to end up beside the ball and B steps onto the ball..The mechanism then raises B on ball and B squirts out onto a sand block

In retrospect i see that i made thngs unnecessarily complicated and missed the reverse of a move that B had already performed..

Spoiler: Video of move

https://youtube.com/shorts/N_Iq_sStZ4M?feature=shared

@ridgerunner Interesting, the way u unlocked pillar R withou B on the ball, was cool. I tried every possibilities when I built the level to cut any way possible other than the designed gameplay. But B's underwater journey is quite daring. Thanks for playing friend

Great level.

Great level, although I didn't get the hidden part. Used the video there.

@Propesyonal @Block builder Thanks for playing friends. Glad you liked it

As always, a very nice & enjoyable level ... thanks my friend @Nathan Sabari well done!

@delator77 Thank you so much my friend

This is, of course, another very interesting level from you that also definitely deserves a 5!
Although I’ll tell you honestly, I don’t really like timing at high logical levels. At first I thought it was a shortcut - because the timing is very tight. And I was surprised that this was the right decision. I'll tell you that such strict timing was previously indicated along with tricks in the description (because, like tricks, such timing is not used in classic logic levels and it is more difficult than some tricks!). That's why I still indicate in the description - timing. This is of course not necessary, but I do it to make it easier to understand the level
By the way, in addition to timing, you have trick:

Spoiler

autopilot for R

.
Without this trick, it is impossible to pass the end of the level using only logic.
I also unlocked R by

Spoiler

tossing the ball

like in the video @ridgerunner (to avoid risky timing). Otherwise my gameplay is the same as yours. Thanks 5 from me!

P.S. Oh, sorry, I see that you indicated in the description what I said! I didn't see this when I played the level a few days ago (I didn't have time to write a comment because I had a lot of work, and I wrote it just now, although I played it a few days ago)
You did the right thing!!

@Nathan Sabari - I gave it a go and gave up as I wasn't able to see how to get B over to the other side after P was redirected. I checked out the video and of course it was something that I couldn't see. If I had not pushed the slider back after P was released then I may have lucked in but again who knows what is going to happen in the hidden - that is why I would rather not play hidden as levels can be hard enough without any hidden.

Clever logic level trickier than it looks took me a while