All levels are listed in Hexadecimal order for easy location. Most levels contain a definition of the level and every level shows any exits to other levels. This was to make mapping of levels easier by being able to look up by a level number (D8, 1CB, ETC.) or by keywords ([FIGHT], etc.) and be able to see all of the levels associated with it as well. It can also be used as an easy tracker for your levels by inputting your own names and info to keep your hack better organized. Or as a learning tool, just to know where everything is situated in the vanilla game.
v2 Updated based on suggestions by other users. Fixed Grammatical Errors Better Organized A Few Loose Ends Tied Up
Sorry, but I fail to see the utility in this. Like... I guess it might be useful for those who want to see where every vanilla level/sublevel is, but people can just check this with a quick Lunar Magic search. Outside of that scope, its utility as a "personal tracker" can as well be accomplished in a more organized manner by other means.