“Behold EatMessage, an app that turns your face into a controller so you send your friends selfies of you doing strange things with your mouth.”

http://www.theverge.com/2017/2/16/14637546/eatmessage-imessage-game-app-release

Futurefly released one of the first iMessage games – and made it into an AR game, where your face is the controller!

http://venturebeat.com/2017/02/16/futureflys-eatmessage-app-turns-your-face-into-a-game-controller/