You can transfer your game progress from an old device to a new one by connecting the game on your new device to the same Facebook account you used for the first device:
1. Install the game from your device's application store on the new device.
2. Connect the newly installed game to the same Facebook account you used on the old device.
3. Tap Download in the pop-up window.
4. Type CONFIRM to finish.

Your game progress will be transferred, and you'll be able to continue your saved game on the new device.