Octave

OCTAVE! Enjoy a simle scale game with your family, friends, colleagues.
It is the game that your voice follow piano scales in order of Do, Re, Mi.
and that make a great time with your family, friends, colleagues through very simple game rule.
First, participants set up their turns, when my turn comes, should make a sound corresponding to the sacle.
Octave will pass you if correct, otherwise will display Fail sign.