I released v0.9.1 with a few balance changes to the wall jump sections, including adding platforms in several places to alleviate how grueling some can be. The general feedback though has indeed been that there's a bit too much/too difficult wall jumping - I'll definitely be toning it way back in future level. I doubt ANY other level in the game will require quite as much jumping/wall jumping as level 3.
I'm also still working out better ways to communicate the direction the player is supposed to go. A map is definitely on the task list, maps just can be a bit complex to set up depending on how they're done, so I'm still working out what method I want to use for that.