When you run a game, you can open GameGuardian and select the process of the app you want to modify. Once GameGuardian is installed, you can leave the app running in the background with a semitransparent icon that you can see on the screen at all times.
GameGuardian is an app that lets you modify the content of your Android video games to get advantages and improvements ‘illegally.’ It works based on code injection during the runtime to modify the parameters you want.