If i submit a game on this jam, do i need to keep it free and untouched even after the jam has been finished... or can i work on it, post it as a demo and, in a future, put a price on it when its completly polished and ready for selling?
The game and all the rights for it stay with you of course so you can do with it whatever you want. For the sake of fairness I'd just ask you not to update the game during the one week rating period please. :)