The latest Human: Fall Flat Forest level is the apex of hardships. You’ll have to toil in mines, jump among cliffs without a safety net, ruin the woods with a wrecking ball, and do other crazy things to get out.
In the case of a drunken jelly man under your control, haste will make the situation worse. Be consistent and confident in your movements, so you won’t repeat the level over and over. And if you can’t figure out what to do next, search for a tutorial stick nearby!