Mobile Game automation testing using Appium,Opencv and Bitbar Akaze (Image Recognition)

I want to learn how to test mobile games using Appium, so i found it could be done using Image Recognition. I found this https://bitbar.com/appium-tip-27-using-appium-for-mobile-game-testing/ I'm truly stuck in it couldn't understand what i should do or add in Eclipse to test mobile games using Appium.

If anyone know how to test mobile game using Appium rather than Image Recognition please tell me.

Please, if any one have any tutorial or a clear steps of mobile game testing automation tell me.