Looks nice
Yeah, we are interested in themes, not in genres (genre should be "roguelike", usually, maybe except for hybrids like Spelunky:) I added "genre" and "status" because they seemed to contain useful information, but yes, the RogueBasin should be cleaned instead.
As for other fields IRLDb does not use: "download" (not sure whether this is required in IRLDb), "influence" (instead of "influences" - many games have that, but it is always empty anyway AFAIK), and "engine-stable" used by Lair of Demon Ape.