https://opensource.com/article/17/8/ope ... nouncement
https://itch.io/jam/open-jam-1
How is Open Jam different?
Open Jam is all about open source games and open game development. While some jams require participants to submit source code for their games, not all of them require that code to be open source licensed. Open Jam encourages you to use open source tools and assets and to link them in your submission. Anything open source in your game creation process is encouraged!