How to save game data on the cloud
Go to the device settings
Select the device profile
Select iCloud > Enable it
Now make sure the game has iCloud enabled
Ensure Gamecenter has iCloud enabled too
How to transfer your Game progress on to another device
In order to transfer your game data, you will need to sign into a GameCenter account, and follow the instructions listed above.
Install and launch the game on the desired device
Sign into GameCenter on boot
The Cloud Save Conflict will appear - allowing you to choose the Game data from the server or local game data
Key notes:
The Cloud Save Conflict will not appear if you uninstalled/installed the game.
If you see the save conflict popup but close the game from this point, the game will proceed to select the cloud save upon next boot.