How do I transfer my progress to a new device?

You can transfer your progress with unlocked buildings by syncing the game between your old device and your new one, either via Facebook or your Apple ID / Google Play data (for Apple / Android devices). 

To do so, you need to log in to your Facebook account in the game on the old device, and then do the same on the new device - the progress should synchronize.

It is also possible to synchronize your progress via Apple ID / Google Play data in case you are playing on an Apple / Android device. If you had that type of synchronization in your previous game, then you can use it again to restore your gaming progress in your new game on the same platform.