Thanks for this link. Now that I am invested into Old School Role Playing Games, knowing how to best navigate those older maps is useful.
There is one more interesting feature concerning this map, which may not be noticeable first, but which has a strong bearing on its flow. This is the presence of long corridors linking distant corners of the dungeon, and once you look for them, you will find a bunch. We might call them accelerators (or fast lanes?), since clearing them allows fast travel through the dungeon.