Being sick is no excuse for no map, and neither is artist's block! This bad boy turned out pretty well, and I'd say it's a fair approximation of the house our tree-sliding hero lives in (if only briefly). While the only access point for humans is that rope ladder followed by an EXTREMELY exposed rope bridge, this dwelling does offer unfortunately limited protection from predators that are at home in the trees. But your characters won't have to worry about that...right?
I think at the very least one could argue for a Dexterity (Acrobatics) check to do that super cool branch-surfing Tarzan does, with advantage if they can belt out a Phil Collins song while doing it. And maybe disadvantage if they're wearing shoes - or maybe they just move slower!