How do I transfer progress from one iOS device to another?

To transfer your existing progress from and older iOS device to a new iOS device, you'll first need to ensure Game Center is enabled in your iPhone's settings. 

1. In your old device, open the game and connect to Game Center from the settings and make sure it connects successfully
2. In your new device, open the game and connect to Game Center from the settings using the same Apple iTunes account as previous step
3. Once successful, the game will refresh and your data should be loaded.