Factory

Interesting mechanism at the start. A fine herding exercise with no real roadmap immediately evident. Each piece critical to the final solution; imaginatively constructed.

A really nice level. Very interesting gameplay.

Spoiler

I think the solution you have thought is to get both B and R to the top to move the star.
But with a little effort, by making B go back and forth from the mechanism that pushes the star, you can move it even without the help of R. However it is not something obvious (I noticed it by mistake).

Hello. Lots of hidden mechanisms here, and it was kind of fun figuring out how to start, and exploring the functions of all of the sliders. The vertical slider under the rotating motor, as well as the rotating motor aren't necessary, as B can reach R with SSS trick. It took me quite a while to figure out that the large mechanism also operated as a mechanical bridge for R and B to cross. I must say, moving R across an automatically moving mechanism is super unstable. I know exactly how to beat your level, but I simply cannot get R to safely cross the hidden automatic slider.

I might try again, but it's frustrating to SEE victory and not grasp it. I suppose I am more akin to logic type puzzles than timing. So, in that facet, I think it's just a matter of preference.