Sorry if i didnt get it, but are there assets that we are supposed to use?, or we have to make it ourselves, or search for them in other places
On December 16th (one week before the jam starts), there will be a vote for the asset that looks like this:

After everyone votes, the winner will be the "THEME ASSET" for the jam, and everyone uses that asset in their games
Beyond that, you create everything yourself or source free/licensed assets to use