Possibly stupid question - What happens to Splinterlands if the company/servers shut down?

I am aware that the cards themselves will continue to exist on Hive-Engine as tokens.

However

1. Can the game still be played?
2. Can anyone run a server (is it open source?)
3. Can all the game assets still be used (card art, sound effects etc.) in the game? Are those assets copyrighted?
4. Can new sets be created? Does the governance system allow for people other than the original Splinterlands company to create and officially sanction new sets?