Some more to add to the conversation.
The wife's username seems to be #ù%Jhl&, though I can't tell exactly what is above the u or whether the second to last character is a lowercase L or a capital i. Interesting note, if the u is actually ù, then it can be called a u with a grave. (dead wife? grave?)
There are pillars, trees and crossbars that will disappear and reappear seemingly at random. It does not seem to be consistent across different playthroughs or game states. Also the two pillars in the room with the gramophone seem to have no collision, but there doesn't seem to be anything hidden in them. We haven't checked there at all points in the game, though.
One question I have: the game is supposed to be a capture the flag game with multiple servers that seem to include both public, developer run servers (the first three) and player run servers. Who made these player run servers? Did this game actually have an actual playerbase at one point? Is JOHN_DEV just really invested in making his dead wife resurrection game appear as though it had an acive playerbase at one point?