North Pole

Spoiler: Tricks

Autopilot
Claustrophobia
Hercules push
Cancel tap
Slider freeze

Bots R and L can walk on all blocks beyond the 16x16x16 space. (Forgot the name of this trick...).

Finally I won. My problem was that I didn't see (didn't notice) the very important slider under the sled!! That's why I couldn't pass the level. When I noticed this fateful slider under the sled, I was able to think of a way to win.
GREAT DESIGN!!! Very well made reindeer and sleigh. Christmas atmosphere - Christmas tree, sleigh with deer, house, candles.
The gameplay is also very interesting. Some sliders are difficult to see, so this can be a problem. But, when you find all the sliders on the level, everything becomes clear. Thanks!! HAPPY NEW YEAR

So that more players can pass your beautiful holiday level, I recorded a video

Spoiler: VS

@Denis Nazin, thank you very very very very much my friend!!!
Happy New Year!

He most wonderful Christmas indeed! Thanks to @Denis Nazin for the vs as I needed help with Lefty's first task. Really enjoyed this Cooperative Christmas level

I'm glad you made it through this level, yes, the first move is a bit hidden and non-standard.
Thank you very much my friend @Sammy 5!