I BTW should add that “nonlinear” has two meanings - nonlinear in the Antichamber sense means “the ending is always the same, but the path to it has many variations”. Metroidvania style, basicaly. BTW, Antichamber actually has a “second ending” which is most likely actually a glitch, but conveys a quite different story: https://www.youtube.com/watch?v=wGY2nXjXuTE :)
Stanley OTOH has a quite different kind of nonlinearity. With few exceptions, the path to each ending is always the same, but there are a LOT of branch points. However this is just true on the surface - given that some actions change the game permanently, Stanley also has Metroidvania-style nonlinearity on a level above the gameplay itself.
So, I can’t quite tell which kind of nonlinearity fits your game better. An interesting hybrid is a form of nonlinearity where only some actions decide later outcomes, however most of the game proceeds the same no matter which choices you made. A wellknown game of that kind is Undertale, although this concept has been in use way earlier.
Also, as I was lucky, I now made it to the minutes ending - that one actually was quite good looking.
One issue I BTW had - for me mouse capture did not work correctly. Might be a problem of my system. I thus ended up playing with using the touchscreen to look around, which worked rather well actually.
I also don’t quite understand the point of the many-doors room, given it appears to only have one exit. Also, instead of highlighting the correct exit, a fun solution might be making whichever door the player opens after a few attempts the correct door (maybe 7 attempts is good?).