Hello.
The game has been built for Android 5.1 (Lollipop), so your phone must run it without any problems.
Are you sure that the installation error is related to the compatibility issue? Perhaps you are using some antivirus software and it makes a false detection?
Also you should make sure that you are using the original Android, I cannot guarantee the correct operation of the application on custom (non-standard) firmware.
At the moment, you are the only user who has a problem with the installation. Please make a screenshot of the error and send it to me, I will try to figure it out.
All the error says is "You can't install the app on your device". I have enabled installing apps from unknown sources.