This level has potential but the ball R pushes has a very unstable path, and doesn't stay in it's intended end position. B and the hidden ball aren't required at all.
Welcome to the forum! It's a nice level with some good ideas. In my case, the ball worked fine at first try but I agree it seems unfinished level as B and hidden ball are not used... Anyway, thanks for sharing!
I had no idea how to get going and now I read that "its not much good" - please don't post levels that aren't much good. Spoiler The ball by B only falls outward so is there something hidden?