You can perform the following simple steps if you have been playing as a guest account and want to bind your account to Ather Account:
1. Create an Ather Account at https://account.atherlabs.com/onboarding
2. Open "Settings" in the game and choose "Account".
3. Tab "Connect" and log in to your Ather Account to bind them together.
4. Congrats! Your guest account is now linked to an Ather Account, and your progress is now saved onto your account!