Thank you for you feedback! I'm glad that you (and also some other comments I read) liked the game, even though you are not a big fan of mazes. :)
An item to unlock the closed exits sounds very interesting, I actually have not thought about that (but I also have to admit that the closed-exits mechanic was kind of a spontaneous decision, because I found it too easy to just memorize one single path that works every time).
I though having these ambient sounds is a bit more "vibey" (is that even a word?) and it fits better than having the same music as in the main menu.
About the idea with the riddle / puzzle, as I mentioned in the previous comment, it is a cool idea, but I basically lacked time (and knowledge too) to implement something like this. But it's definitely a considerable idea for a remake / extension of the game. :)