1 - Download the APK file: If you want to update the application, install the new apk file without deleting the old one. Otherwise, progress will not be saved. Check out the tutorial by clicking here: https://techtodown.com/choices-apk-mod/
2 - Allow in the settings to install applications from unknown sources (done once)
3 - Install the apk (downloaded files are usually placed in the "Downloads" folder)
4 - Run the application
WARNING: When playing this apk, disable automatic login in the Google Play Games app. How to do this is written here .