Hi,
yes, I think the best option would be that every one who wants to sponsor this game jam comes forward, and the winners will end up with a bunch of games and assets, this would be a very participative way to grant participants and winners with a feeling of community.
what do you think? If that's an idea that you like, we could have a google sheet or some kind of online document where we list all the prizes, all the categories and rules?
Bye,
Jean