If you connected to a Facebook account within Toy Blast, you can connect to the same Facebook account and keep playing from where you left off.
If you did not connect to a Facebook account your progress on a guest account is saved only on the device you play.
If you’ve recently switched devices, we recommend that you to connect to a Facebook account on your old device first to sync your progress, and then on your new device to continue playing from where you left off.
Unfortunately, if you reformatted your device while using a guest account, it is not possible to recover your account once the game data has been erased completely.