To test mobile games effectively, game testers need to focus on key areas such as interface testing, which includes onboarding experience, layout and element design, menu structure, and ensuring a seamless user experience. Graphics performance is also crucial, with testers verifying that the game runs smoothly on various devices and doesn't cause lags or crashes. Security testing is another critical aspect, where testers need to identify potential vulnerabilities in third-party tools and ensure data leaks are not occurring. Additionally, external devices such as controllers and VR gadgets need to be tested for compatibility. While mobile game testing shares similarities with app testing, it requires a more nuanced approach, involving functional testing, performance testing, localization testing, and using specialized tools like Live Replay, Device Cloud, and User Input to enhance the testing experience.