Slithering around and climbing through jungle gyms of worlds is a very novel idea for a video game, however in practice it leaves a bit wanting. The biggest issue comes down to just simply the length of levels, which are so long and you can't save in the middle one so you're stuck between a rock and a hard place if you want to play something else and not lose progress. Still, the unique traversal controls work very well and slowly working your way up the terrain is pretty rewarding if slow.