This is a unique number of your progress in our database, which is created when you first start the game on your iOS and Android device.
This code can be found in the main menu of the game, in the upper left corner of the Settings window.
Also in the left corner is the version number of the game that is installed on the device.
Game ID is needed to quickly find your game in the database.
We recommend making a screenshot of the Settings window and keeping it in case of errors in the game.
You can also send it to us. The next time when you contact our support, we can help you much faster.