Excellent! In morning, I tried this very much, but I failed again and again on the top part. But now in evening, I thought to give a one more try, and I won without much waiting on the top. I figure out there are 40% chance of being alive; going through the gaps of zRs; getting Ball and Star without getting zapped. I didn't give up on this, because I am fan of zapper dodging and timing levels.
@Link - I can't say EXCELLENT like I see above as when B dropped the high ball, it worked it's way to the bottom, hit the rail and started to drift backward past the stone pillar so I knew it was a restart. Not sure why there was a zapper by the ball where B starts as B can't get to it? I didn't like the hidden ball as levels can be hard enough without any hidden. Too bad the ball bounce back was a problem - a wedge under the ball would have fixed that.
@Meko Guy Sorry this happened to you. I thought it was okay and always-working because all the times I played it went through the metal hole and into the water, leting you get the star there.