Coin Flapper game for Android devices is a fun way to earn free Bitcoin in your idle hours. It is more like the Flappy Birds Android game which is really popular game of a couple years ago.
The game awards you based on how you do in a tournament against other flappers. If you win, you get 0.000006 BTC, and you are allowed to play 200 free games per day.
The producer, Bitplay.Today also has a “pro” version of Coin Flapper that allows users to pay a small fee and earn bigger prizes (up to 0.003 instead of 0.000006).