• For team formation, does every members have to sign in with their itch.io accounts and join the jam to be considered? Or one joined account per team for file submission is enough? What if a teammate works with different teams or going solo at the same time?

• Are there limitations on using public / license-free assets (3d props, music, etc.), Or assets have to be created from scratch?

^

Hi there

For team formation just one account is fine, but please include credits on the Itch Page

Re assets, self-made or free existing assets are acceptable. 

Thank you!