Good questions! One of the rules of the jam is that submitted games must pass moderation. We recommend that you send a version of your game for moderation ahead of time to give you an idea of what kind of issues you may have with the integration and how your game behaves when played on Yandex platform.
Yandex have promised to give priority to games with the “game jam 21” tag, so moderation should be quick. You can keep working on your game while it is being moderated and if issues are found during moderation you hopefully have time to fix them and resubmit.
We have been debating wether to accept updates to submissions after November 30th, but that might just result in a situation where developers hold off on sending their games to moderation or wait to address issues with moderation to the last day.
We may make exceptions if you’re close to passing moderation, but it will be done on a case by case basis.
Once the jam is over and the winners have been announced we encourage everyone to keep working on their games.