Calling for harm to be visited to the devs is wrong.
Having said that, whomever designed that particular challenge probably needs some counselling, because they clearly have some deep-seated hatred towards the rest of mankind.
I finished the maze, and now I want nothing more than to crawl into a corner and quietly shrivel into dust. 
It’s honestly pretty dumb. All the puzzles are. No average person is solving any of the 3.
Furthermore, I got the axe and it’s bugged and won’t chop down trees…so…yeah. That’s fun.
Finally figured out how to cut tress. Gotta click your hero to stop then click axe and tree.
I think this sort of puzzle is absolutely stupid bonkers crazy for ANY ONE. No single person will ever figure it out. You absolutely have to use the online tutorial for all 3 and I think that’s ridiculous. It’s not fun. The maze is so crazy big. It would take a single person something like 2,000 hours just to map this thing. Possibly more.
But on the plus side, you get a card back no one else is going to have.
EDIT: I finally finished this thing. Oh my goodness, this is not for the faint of heart…that was ridiculous.
My logic is that there is some card backs I’ll never have anyway (special event, invitationals etc.). Seeing as I can’t 100% my card backs, I may as well add this on to the pile and save my sanity, time, my hair, my nails… anything that might get ripped or thrown lol.
I saw the maze and that was the straw that broke the camels back. I can live without this card back (I did do the Barrens and Stormwind one).
Look, as far as ideas go… it’s pretty ingenious to create a dungeon crawler inside a card game. It’s just too slow and tedious. If you didn’t have to collect the gold and only had the 1 dungeon, I’d probably do it.
They went too far this time in my opinion.
Yeah. Creating puzzles that aren’t meant for people to solve on their own? I completely disagree with that, but sure, I can live with that. But creating a puzzle of this length? It’s so insane there’s no proper word in any language’s dictionary to describe exactly how insane it is. It’s so insane that insanity seems sane in comparison.
The worst part is the way they had to try and make a busted UI like you’ve described. No explanation of what you’re looking at or trying to do.
Thank you so much for this. Super intuitive interface they have here 