The trick to the switches is that you have to use the red switch in the bottom left twice and afterwards use the yellow switch twice again as the door it opens got closed again. The right combination is:
Yellow switch top left
Green switch middle
Red switch bottom left (2x!)
Yellow top left (2x! because the door it opens has been closed again)
Blue bottom right
Wow, fast response, and from the Dev no less. I honestly still don't get how the switches correspond to the doors in that map, doesn't seem to be 1:1 and with the doors always out of sight it's hard to figure out, but once I sobered up I got it w/o much trouble and your walk-through helped a lot doing the thieves guild quests since I forgot I had teleport tokens -_-.
Since the Dev personally responded here's my feed-back: very impressed. I only just ran into this game ~1wk ago but I like the design a lot. The phase 1 (before time skip) still seems a bit unfinished despite it's significant size (in fact it's large enough I'm not sure how you're going to manage all these kids Ryen is pumping out). My favorite characters are, in order: Tsubaki, Hellhound, and Lace (IDK why Lace makes the list either, expect for maybe revenge is sweet and she really has no character development until you get her in a dungeon cell). I love the big world and how you've populated it with side quest and capturable monster girls (who don't re-spawn, definitely loving it). The construction world map and battles are still a fair bit clunky but as I understand that's still under development. I still haven't quite finished my "evil" run (still missing about 5 CG's, some are hard to track down), and still plan to do a completely new "good" run, but have mostly finished the game as it stands so far.
On the whole: 5/5. One of the top 5 patreon games I've run into.