Nah. Just kind of an amalgamation of various games I've played. A little D&D, a little old school jrpg like dragon quest, and little dungeon crawl plus some other random stuff.
Keeps you safe from readers rules-lawyering you that way too! (I've likewise gone for not having a specific ruleset in the comic I've been starting out on writing recently which has a vaguely D&D like world).
Are all the tilesets for this your work? They're really nice - I particularly like the focus on the heroes' hats, it helps give them some clear identifiers despite the very minimalist style