The start was pretty easy but the end wasn't so. The end to me was very unstable but I did get it. Spoiler The ball would stick out of B's reach and not fall or B would get stuck on the grass or the ball would roll off and out. Question 1: was the intended way to drop the ball with a slide bump, B on slider go thru the grass block and bump ball. Question 2: Was the last move an auto pilot / mid air tap? With B at the far end of the slider, tap the other end of slider, slide slider thru grass, and tap the grass block where the ball was.
@Nikesh Runner - I never thought of using no eye R and your way is much slower but more stable. Here's my way: Spoiler: Video