Well, okay, one thing I was thinking of that I wasn't sure would be too clunky or not would be to somehow categorize the games themselves by series. For example if someone wanted to just look at Mega Man maps that they could see the whole series. Or the whole Castlevania series, or the whole Super Mario series, etc.
There must also be some better way to handle remakes/ports/compilations. Perhaps the map tables (for lack of a better term) could have more information in the title box, like clickable links to see the whole series (as above), or quick links to other versions of the same game?
I don't want there to be too much information, but often looking at the directory as it is now, I often wonder if I make it clear enough what games are available for the expected console, etc.
I want it to be easy to find the maps one is looking for, while still being able to simply browse.