Rules - The only rule is that your creation has to include some sort of pumpkin, gourd, squash or something of that ilk. If you want to incorporate 3D printed stuff, NFT's, coins, whatever, all the better! There will only be one entry per person (but this can include a bulk of items together (i.e. a 3 pumpkin set with a drawing next to it, for example).
Edit:
As for the rules, yes , it MUST be bitcoin related in some fashion. If its just some regular pumpkin, without any bitcoin anything connected to it, it does not qualify.
A bit pity that the rules of the contest were updated right after the submission date has passed

Literally says in the title BitcoinTalk BITCOIN pumpkin carving contest. It should have been obvious it needed to be bitcoin related based on the OP which says bitcoin in the title, has multiple examples of bitcoin carved pumpkins as well as what aoluain mentioned, that I mentioned this several other times throughout the contest.