Questions or a bug? Mail hello@dav-dev.nl.
Tap Play. Press and hold the big button. Release when you think the shown number of seconds has passed. If you land inside the band, you pass. If not, try again.
That is the point. You go by feel. The bar afterwards shows how close you were.
Banners sit on the home, game, result and awards screens. After every three completed levels you may see a full-screen ad. Fails do not count toward that.
Progress is stored on the device. Deleting the app or switching phones starts you over, except Game Center awards if you were signed in.
See the privacy policy.