I like the primary map a lot. Gives me some gothic / underground sensations which I think really add character to it. The idea of mixing two differently scaled sizes of street layout is quite interesting and reinforces the idea of a labyrinth.
The way of representing fields dos not work for me though; neither does the use of pink in largE areas of the zoomed-in maps. I think the original spirit gets lost there. It's just my personal opinion, tho