Boulder

I gave your level a go and gave up as the balls will not fall correctly. The timing requirement to have Z block the ball is bad enough but the last ball doesn't stay long enough for B to get over it. Very unstable as the lower ball can drift on the flat surface.

Wow!! Excellent balls/logic and a bit tricky level,really a challenging path...The design is very nice too...And this is your second level?GREAT!! Thanks for sharing and excellent job @Madmax Btw...

Spoiler

Poor B,he must die

Can someone give me any spoilers about the last part???

Finally finished it!!! But it seems that the balls don't always work and...

Spoiler

The ball that needs Zapper bot to block it doesn't need to be nudged(Or maybe I'm missing something,probably not)

So I'll rate 4 stars!!!

Superb for a second level. I thought one of the balls was a red herring but i see it does something hidden and is required.

Finally finished.
I am giving four stars because the ideas are cool and it's your second level but it doesn't work well. You should polish and test more the levels before publishing because tha balls fail a lot.
Also I think the required trick was not necessary in the level.
Thanks for sharing!