Currently Google Glass lets you send messages, make calls, and do other standard things that smartphones can do, but its still lacking in games. In an effort to get game developers on the Glass bandwagon, Google has demoed five mini games for Glass that are super simple, but also show the gaming potential of the headset. By saying Ok Glass, play a game, users can access the mini games from the main voice menu. Each game takes advantage of a specific Glass technology: Tennis uses the gyroscope and accelerometer to detect head tilts and hit the ball;