I thought the level was excellent until the ball at the win didn't roll off. I restarted and it worked but too bad others also had the same issue.
I believe that one trick is required at the end. Spoiler: Trick Side-step stairs (SSS) The ending ball worked for me more often than not, but it doesn't need to work properly to win. I counted three variations on the winning move: Spoiler Knock the high ball down, the high ball knocks the low ball down, the resulting hole makes Pillar R turn around, which makes it easier for B to cross over. If the low ball doesn't move, B can still cross over Pillar R with good timing. Dropping the high ball just before Pillar R gets there can get in Pillar R's way & make it turn around. If B can SSS quickly enough, B can easily cross over. I used method #3 in my video solution below, but I got all three to work. Spoiler: Video Solution Anyway, this is a nice little logic puzzle. I enjoyed it thoroughly enough that I bumped my rating up to five stars. Thank you for sharing, @Savage !