Hello, 

A lot of the assets on itch are free but do not have a open source license . Are these still allowed in this Jam?

Thanks 

G

I can't really answer that without knowing what licensing is applied to those assets, even if it is just implicit copyright. Those assets are definitely not eligible for open source karma points. there may also be legal restrictions on their use based on what license they have.

Maybe give https://opengameart.org a shot ;)