To transfer the levels from your old tablet to the new one, simply connect the game to the same Facebook or King account on your new tablet.
If you didn't have the game saved on any account on your old tablet, then connect it there first to save the levels and then connect the game to the same account on the new device.
If you no longer have access to the account where your game is saved on on the old tablet or no longer have access to the old tablet, please let me know the Game ID in the game on your new tablet and what level you were on and I will manually restore the levels for you.