The Star.

Spoiler: Tips

The star blocks B's path, but does not block R's.
The ball that is dropped by R needs to be held by B.

Spoiler: Video solution.

Liked the unusual winblock capture.

@ridgerunner Thanks for playing and for the great review. I'm glad you enjoyed this method.

...
so technically,
ball catch the ball ontop of winblock?

@Ray Aznable Hello. Thanks for playing and rating. Technically, I think the ball hits the star. And on the other ball the star blocks B's path..

Yes, the last step was cool ... as always, very nice gameplay & design... thanks @Jóh well done!

@delator77 Thanks friend. I'm glad you liked my level.

@cimarronline I'm very happy when something new happens when I'm building a level. I'm even happier when this new thing works well and pleases good mekorama players. Thank you very much for your feedback.

Excellent level. Congratulations. Great adventure.

@Jamal Thank you very much for playing and rating my friend.

I haven't been on the forum for a long time and I missed this level from you. But I'm glad I found it and played it.
Great design, great interesting gameplay. Of course 5! Thank you, I really liked it

@Denis Nazin Thank you friend for playing and evaluating my level. I'm glad you liked it. I haven't done any levels in a long time. I want to go back, but I'm running out of time.

@Jóh

Spoiler

Glad to see you, like me you are still active but facing same issues of time
I still remember that you used special sensor mechanism, you were my inspiration ✨ Long ago, I tried to use one of your sensor mechanism but failed