In my mind the "whole puzzle about the introduction of the jump height mechanic" was what level 6 was meant to be, but I figured I'd add a couple additional steps to get the box upside down (since they were steps you basically had to do in level 5 as well), but I guess I fell victim to the creator finding their game easier than the players problem, and underestimated the complexity that level 6 ended up adding to the discovery of the jump height mechanic.