Probably someone else must've also watched this in the past few hours or days.
I like this. I like that his system pushes the creative process forward without relinquishing the actual creative part of it (making the map tile).
And that reminds me of the time when I saw him in passing in a corridor at King's Cross Thameslink and my hand was halfway up into a wave before I realised that he wouldn't know who am.
I remember the book of https://en.wikipedia.org/wiki/Henry_Darger or https://en.wikipedia.org/wiki/Dwarf_Fortress or Cataclysm DDA .
And weird games as https://en.wikipedia.org/wiki/Nomic .