18.03.2016 23:45
If you want to start a new game, you have to change your Google account on a device. Then you can attach it to a game account.
But if you want to delete your old account from the game database, you can't do it. However, you can create a ticket (Settings → Send a ticket → Submit Tickets → Others) and describe you problem. In this case, the live support can resolve this issue.
Yes
No