"You can basically dictate the distribution rights on any object you create. If you put something in your level as a collectable item, people can collect it. People can control who comes into the level, both by how hard it is and by giving away keys, but you can also choose whether to copyright that object."

Once you've collected a copyright item, you'll be able to use it in your own game levels. However, you won't be share it with anyone else.

If an item isn't copyright, you'll be able to change it and share it as much as you like. "It's a really simple way to allow people to share or maintain ownership," explained Evans.