Everything you have done here in one place, and the one thing worth doing next. It is kept in this browser only; nothing is sent anywhere.
A backup code holds all of it: the Path, rank points, medals, ladders, streaks, your calls on the Ledger, Inside the machine badges, the 3D city and the pages you have read. Make one here, then paste it into this page on the other device. Restoring replaces what that browser has saved, and you can undo it straight away.
It leaves out your theme and motion settings and anything you pasted into the security tools. The older Save code on the Path carries only the Path and rank points.