It's true that there is a lot going on, and you are given an overwhelming number of options. I suggest breaking it down by color. Specifically, all of the colors in the forced(!) chain of doors at the very end have more interesting logic than initially meets the eye. It's a little harder to construct a clear picture of the other colors, as well as where certain Master Keys are used, but I believe it generally becomes something reasonable once you've understood the other constraints well enough. If you aren't going to attempt the puzzle anymore, though, then that's OK. Thanks for playing the rest of the game up until now!
Viewing post in Ultimate Door Logic is too complicated
Thanks for the hint. I was confused if this is meant to be done but based on you message, it reminded me that the game is less so about going from beginning and then finding and ending and more about how much can you enjoy this one game, even if you become sick of it and want pick all the locks away to find the ending. It makes sense when I think of it that way. Besides, there is always the other worlds so I can do those instead.