If you would like to start a new game again, you can simply register a new account.
1. Tap the icon in the bottom right corner of the game's Settings page and select "Register" to register. Note: Please make sure the length of your username is within the length of 6-14 characters and does not contain any punctuation.
2. If you have not bound your Facebook with other IDs, you can tap "Login with Facebook" to log in with your new ID and register your account at the same time.