A long held-belief about Crowther’s Adventure was that it was designed as a “cave simulation” and it was Woods who came along added magic and treasures and turned it from interactive simulation into interactive fiction.
We know, from the hard work of Dennis Jerz locating the original source (before Don Woods started modifying it) that this is not the case: the original Adventure included puzzles, treasures, and fantasy. However, it never answered the question that seems to follow immediately: how does it play? (Past this point there are spoilers.) Observations about Crowther’s original Adventure (1975) « Renga in Blue.