Mafia is a game of secrets. A few players are secretly Mafia and try to wipe out the town. Everyone else is the town and tries to find and vote out the Mafia before it is too late. In this version everybody plays on their own phone, and the host's phone narrates the night out loud.
“Back to the lobby” ends the current round and keeps the room, the players and the scores. “Close the room” removes the room for everyone.