Level 2
"Pipe Dreams"
Level 2 is a long hallway, surrounded by pipes and the sounds of water flowing through. The small lights under the pipes give you an idea of where to go, but it looks self-explanatory anyway.
Despite the name "Pipe Dreams", originally, this level in other fandoms is known as "abandoned utility halls
Although the level isnt exactly straightforward, its not a massive area neither and casually walking will have you in level 3 eventually, even if you havent a clue where to go.
There have been the first-time occurrences of Smilers. An exit can be found after dealing with them which leads to Level 3.