Wow, that was tough. Spoiler Takes some pretty fancy tapping to get the autopilot right. Or at least my solution did.
@kathryn rogers Spoiler The only thing I could figure out was to stand B on the stone block next to the slider nearest the stair, tap a far block of the fallen column, bump him with the slider at just the right moment as he runs by and quickly tap a block beyond the stair. It ain't easy, and I'm not sure it's a designed move, but it worked. The ball on the Roof is a trap.
@Don G Rowe .. your video doesn't start for me..I have only managed to complete using the same method as yourself. It doesn't fell like the proper solution. Spoiler: Possibilities . I was trying to get B to move from the falling tower past the step. My thinking being that just before it lands , the mekorama physics maybe slightly different
