I'm not a fan of AI art games, but from what I've seen, it looks very good. If OP takes care to make the characters not look soulless and doesn't just copy-paste any random thing the AI generates, i can see this game doing well.
Also this might just be personal preference, but don't make the art too detailed please, there's beauty in simplicity
Also this might just be personal preference, but don't make the art too detailed please, there's beauty in simplicity