I understand and can infer most of it, but there’s still one thing I can’t find an answer to. In the end, Akeley became the brain inside the jar. I don’t quite grasp how Wilmarth was deceived by the creatures.

My question concerns what exactly the Akeley sitting in the chair was. If it was merely his hands and face arranged to deceive Wilmarth, was Akeley speaking from inside the device? But if so, how did Wilmarth fail to notice that the voice coming from the other jar was the same as Akeley’s (given that the voices of those in the jars always remain the same)? And if it wasn’t Akeley’s own hands and face, was it one of the creatures in disguise? Furthermore, I don’t understand how that "thing" could have moved—it is described as pointing and making gestures with the heads—if it were just a ruse involving Akeley’s body parts.

We know a little of that realm/world, in the movie version it's like a passage to a world.

It's said to be a dimension but it's informations are so vague to discuss

Do we know if it is related to a realm or a know part of the lovecraftian world?

Great game, just as good as the first! Only two areas of confusion:

-what is the actual time loop that the engineer keeps talking about?

-is there some relation between the elder god being hurt by the yith's usage of his blood and the collapse of their city? why do the yith even care that he doesn't like it?