Players navigate a course using a sound to get around obstacles. The game should utilize all available speakers letting the player find goals and power ups with sound. The player could 'echo' forward to back on the left or right. The resulting three second tone represents how far obstacles are from the player. The closer the object the higher the pitch. With practice the player could 'see' simple shapes and navigate unfamiliar maps. Level designs could go crazy with cool sound effects; mechanical, water, voice, animals, ect.