I was close but I wasn't able to scoop B into the hole that leads to the win. Is that the intended way? With no recovery point when B falls off R, restarting is the only option and B will probably fall again so why bother? I tried scooping up and the same result. Too bad the last move appears to be very unstable - I'll wait for your reply before wasting more time.
Hard to rate as i have not used two balls nor either Rbot. My last half of the level feels like the designed win but my first half must be a shortcut.
The ending was very obscure and my way of squeezing B thru the hole wasn't right. After a little chat with @ridgerunner in a conversation, I had an idea that worked out and therefore was able to win. No tricks as the author advised. Thanks for the level. One point - the high ball on the rail was hard to drop and took longer than it needed.
Updated my rating to 5* as now i have the proper start and used all bots and balls. But the finish is a bit convoluted and its a lot easier for B just to autopilot down rather than build the stack.
@ridgerunner - Your auto pilot is a clever move and I didn't see that this morning as I would have used it for a win as squishing B thru the hole wasn't working.
Hm, interesting! I have read the other comments but it worked better for my B to leave one ball where it is. Excellent puzzle. The first step is a bit hidden.
Now that I know the path, it becomes clear that the less you do, the quicker you reach the win. Initially, I wasted much time on doing things that are actually counterproductive.
@GFJ .”leave one ball” We must be using different gameplay. The ball nearest the centre is necessary to stop R getting isolated and the high ball needed to enable B get uptop in my solution
@ridgerunner Yes, the better you get to know the level, the quicker the solution will be. Spoiler: Quick solution I only used the lower R to push the ball, which releases B and left R circling around the pool. B then pushes the high ball and climbs up the tower.