On your old device:1. Find the in-game Sync feature from the Settings menu:
2. Use your Facebook account to sync the game3. If asked, choose to use the local save file. This pushes your local save file to the cloud and overwrites the save file that was stored there previouslyOn your new device:4. Find the in-game Sync feature from the Settings menu5. Use the same Facebook account as before to sync the game
6. When asked, choose to download the save file from the cloud. This overwrites your local save file with the one from the cloud and keeps the cloud save file updated as long as you have the Sync feature enabled