To quote part of the first description:
"A little colder than the previous ones... Tested, logical and not easy."
Contain traces of trees, and not easy is an understatment
Have fun !

Ranting author's note:
This is typically a grid that I simplified point by point until I managed to solve it... I'll put a clue in the comments. As usual, my goal was not to betray the original, while making decent mountains (I admit I went to see how Serban did it) and with a grid not much larger than the 25x25 from the first one. Deepl helped me with the translation, but suggested trickier instead of cold. I think I would get a lot of angry comments if I stated it was only a little bit more difficult than the original.

Curious about wich side you all started with, feel free to tell me in the comments :) (I've tried all of them to bring some variations to my tests)