Not sure what happened but B got to the win without dropping the top ball. Can't say I liked the hard to see areas so didn't repeat it.
Nice symmetrical design & fun gameplay although I had differences in my solution... Thanks for sharing @Giuseppe Amenta
Some different ways to win this one. Liked the cross-shaped lever in the back. My B accessed it from the ground
What an unusual structure. Many configurations that serve various purposes. I njoyed trying them all. Cool.