Thread:Neo34/@comment-29989042-20171014144801/@comment-27642721-20171014164057

Everytime a brand new game starts your device ids (which should remain constant) are sent to the server. These are stored in your profile data from the last time your game uploaded your progress. The server recognises that the device has played before and offers a restart at the last saved level.

Things can go wrong if the device id changes for some reason, but in that case just let me know and I'll put things right...the game's safe no matter what happens.