One of the neat games at Indiecade was Open Source or as I like to call it Kinect Pong. Instead of moving a joystick or turning a dial to control a paddle you… are the paddle. Players put on a pair of headphones which beep louder when the invisible ball is approaching. Audio cues also let you know the angle of the ball, like if it is approaching from left or right. You can block the ball and protect your goal by moving your body.