Have you given any thought into making a version of this using RPG maker MZ? It Might be more stable if stability is still a concern. RPG maker MZ has a 20 day trial fyi . Random Generated Faces/Characters on RPG maker MZ much like Koikatsu.
RPG maker has a very nice face and tiny chibi character generator, but it can’t generate full-body characters needed to show their bloated bellies :(
XD