Lives

If you're creating a new world, there should be an option for whether you want infinite lives, or a limited amount between 1 and 10. How this works is that however many lives you choose, you and anyone who joins the world will all start with that same amount of lives. If a guest loses all of his or her lives, that player can never join the world again. If the owner of the world loses all of his or her lives, they will not be able to respawn, and they will have to delete the world. In case this ever happens, I would suggest taking screen shots or videos of your creations and posting them online.