Test your singing skills in Hummak - make your way through hazardous maze of green pipes, using nothing more than pitch of your voice.
Hummak is probably the only game in the AppStore, where you can learn to hit right notes in the right time in the ultimately fun way, and - in the very same time - annoy everyone around you with random shouts while you play it. Control the Fly by using pitch of your voice - the higher you sing the higher Fly will fly, try deeper voice to fly lower - make it right in the centre of a gap by singing note placed on both pipes.
Give it a try and have Fun!