3rd

@ohmytian jajaja, no, no, no... I am 44... Don't you think that for being that age the man in the profile is a bit older?
This man is the great Bertrand Russell, a great and famous mathematician and philosopher

@delator77 Oh I see... Never heard of "Bertrand Russell" this name before...

@ohmytian hey my friend, I recently replayed the level because yesterday, when completing it, a doubt was gnawing at me... and I completed it the same way so it seems to be the intended solution... but the doubt persists so I have a question for you...

Spoiler

B has to be pushed up with the draggable/stair to be able to push the last ball, the one with the star on it?

If the answer is no, I found an alternative solution, but logic too

@delator77 Sorry I'm not sure what you really mean so here's how I did it.

Spoiler

B pushed the last star ball using the same method when B pushes the ball on stone pillar which give access to the first mechanism ball. My B doesn't need any push from draggable in order to push that last star ball.

If it's different, then you have found an alternative! Congratulations!

@ohmytian ahh, now I "see" it... well, so my way is an aternative one

Spoiler: Vs

Wow ! And that was tricky, and lots of back and forth with the ball order. Thanks to @RZK as needed help with that as I was knocking all the balls at the far end at once. Didn't notice the falling mechanism until I read the comments. Awesome level and very entertaining

@Sammy 5 Thanks for playing! My levels are of logic ones so you might need to observe the ball paths first before pushing them. Also, I usually include in the level description the tricks/mechanism used to give players a heads up.