Fire and ice

Fire and ice, two beautiful phenomena. They symbolize two opposing forces, that swirl around each other in the balance of things. R represents fire, L represents ice. They never touch, but interact at a distance. One can see they behave equal, but mirrored.

No tricks.

Spoiler: Video

Spoiler: Note on stability

The metal staircase rises in four pieces. In editor mode this always worked. In normal mode and while recording, falling balls did sometimes jam the hidden sliders. A ball then remains visible at the bottom of a hole. I hope this does not affect you.

Beautiful design with a decent gameplay. I never use the one block high lift so in my case Fire and Ice they touch each other! I had no problem with the mechanism and the bots fall flawlessly.(I only played once and won) The only thing to complain is that the gameplay is a bit repetitive.

Great design! I forgot about the one block high lifts so I also never used them. Thus, in my case fire and ice did touch, creating a steam (I imagined ). Also, is B the airbender?

Anyways, loved the yin-and-yang gameplay. Now that's a good use of R & L's different turn directions, making that the main logic of the puzzle. I restarted twice: (1) I sent R to the wrong side first and (2) the southeast ball unfortunately jammed the mechanism.

It was a good story and I kept the ice and fire apart, but two starts had jammed mechanisms each time on my Fire HD tablet.

Using a cool R/L move you built a very nice clean logic level in a really beautiful scenario... thanks @Block builder well done!

Excellent!