The game will only save your progress once you reach level 3, from that point the game will automatically save your progress into our server every 60 seconds, as long as you have internet connection. The game will also automatically save after every purchase to make sure you do not lose any item or currency.
 
In case you're facing internet connection issues you can still close the game, in this case we recommend that you wait 60 seconds or force a save minimizing the game before closing it, to ensure that your game is local saved. It's important that you do not clear cache, data or uninstall the game until you open it again with no connection issues and wait 60 seconds for it to save your progress into our server again.
 
Please keep in mind that if you experience any game or device crashes while playing offline, some of your progress may be lost due to that data not being sent to our game server.