Need more checkpoints, and the physics trees are too random. I got sick of it after getting past the first tall tree (and the pine tree that is completely blocking the path) only to die from some troll nonsense while walking along a path with no trees in sight.
After the player gets past a difficult challenge... there should be a flag. At no point should I have to redo more than 30 seconds of trees I've already solved. That's just boring.