In Part 1, you were exploring short-term memory. In , you enter long-term storage. This is why the environment shifts from white, sterile hallways (Part 1) to dark, organic, webbed corridors (Part 2).
One notable technical achievement is the complete absence of loading screens. When you open a door, the next hallway is generated in the time it takes your brain to register the "creak" sound. This seamlessness is crucial for the game’s hypnotic, trance-inducing effect. doors v036 part 2 by the neuron project
SOURCE: The Neuron Project STATUS: DECLASSIFIED In Part 1, you were exploring short-term memory