I've been enjoying exploring this simulation.
In my journeys, I tried jumping down to the second floor from the bottom (jumping to the bottom floor had caused me to black out, as though I had fallen all the way down the chasm)
Because I was unable to jump to the bottom floor, I decided to take the stairs to the bottom floor.
There were no stairs, and I fell down beneath the library forever.
I reloaded the simulation, jumped down to the second last floor again, and this time, walked in the other direction.
That hallway, like the other, contained nothing.
However, when I approached it, the hallway and another room appeared, along with a number of floors below the one I was on (along with, presumably, a staircase).
I jumped down the chasm once again, to get to the lower floors faster, but blacked out immediately, as though I had reached the bottom.
When I came to, I saw that the floor below me contained a man, so I jumped down to speak to him, for I had only seen one other so far, and I wanted to see if this man was the same.