Thanks for taking the time to reply.
Everything not in the quest isn't judged. The itch page design, the homebrew cards, none of it matters for submission purposes. Go ham on cards...or don't make any at all. These honestly are for your flavor but aren't counted as part of the quest.
So if monster stats are on the card, but not in the quest notes, will the card be ignored or will it be used when you playtest?
Everything else it sounds like my quest was within the boundaries of the rules, so I'll be good for next year.