In case you need to re-install the game or want to play on another device, connect your player account with your email address.

Go to “Settings” > “Account” > “Edit Account”.
settinges
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Enter your e-mail address and a password. Done!
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Make sure, the e-mail address is valid and you have access to the mailbox. Otherwise we cannot resend your password in case of a password loss.

PS: With this trick, you can even play on different platforms. Sometimes with an Android device and at other times with an iOS device. But make sure that you have properly closed the game before you switch the device!