Yell Hop is a game you play with your voice. Say "aaah" and the frog walks along its lily pad. Yell, and it hops. The louder you yell, the higher and further it goes.
The pond is made of lily pads, floating logs, rocks and tree stumps, and it gets trickier the further you go: wider gaps, smaller pads and taller stumps. Fall in and you can watch a short ad to keep going, or start again.
The microphone is only used to measure how loud you are while you play. Nothing is recorded or sent anywhere. Somewhere you can't shout? Switch to touch mode. The game is free and supported by ads.