I suspect there is a hint in the name of the document. I can't tell how these "puzzles" are meant to be puzzles and to this day I never figured out how people were meant to solve them in the context of the game. The Discworld series as I recall were terrible for this, but these puzzle structure diagrams just don't make sense to me. What is the player being challenged to do? Grim Fandango is trying to tell a story but it won't reveal what the story is until after the player has already figured it out through telepathy and brute force clicking.
For all these games were landmarks it was an era where it wasn't obvious what a computer game could or should do to be interesting and entertaining. Something like Return of the Obra Dinn captures the intent of these games (storytelling through close inspection) much more cleanly.