Rail

Spoiler: Hint

pull up to tighten the rails, press down to stretch the rails (you have to press a little hard).

Great rails mechanism & satisfying logic gameplay... thanks for sharing @DDD

Supercalifragilisticexpialidocious

Super! Cool idea, cool design, original gameplay thank you

Clever finish and i liked the gameplay but I struggled to get the balls high enough and found the rails awkward to move which took away some of the fun.

I recently decided not to give a 5 stars mark unless the level is really « excellent »
Well done. I found very quickly how to handle the rails. (I loved playing such games for real when I was a kid ).
The gameplay is easy but the discovery is great. I liked to reach the WB and then discover there is a last action to perform. Great use of B to finish the ball path !
Congrats

...
failed once
bcz of try to do autopilot
ontop of rolling ball.

turned out,

Spoiler

B need to headbump ball,
to make it stay near finish.

What a fresh level! Lovely gameplay. The last step got me. The hint of @Ray Aznable exposed a clever solution.

Afraid I couldn't get the balls high enough to progress the level. I would love to see a video as this sounds like a really interesting level.
Thank you for sharing.

Thank you @cimarronline for such a prompt response. I appreciate you taking time out to do this. Most kind and I appreciate it very much.
I'm glad I asked as this is a most interesting and novel level. I was on the right lines but no longer have the manual dexterity to accomplish the task.
Obviously a five and congratulations to @DDD for a level which has deservedly attracted praise from the Mekorama top team.

Excellent!

What an unusual ball placement system. I, also, had to launch the balls a few times to get the right elevation, but they came back to launch again, which helped. Figuring out the final ball placement needed restarts, but that one odd slider lift had a use after all. Then the slow roll at the end...anticipation city! Great puzzle & greater satisfaction with the win! Thanks.