2016-06-27 Significant update. Added a training mode which allows you to custom modify the game by changing pipe gap size, pipe separation, bird speed, bird separation, force of gravity, flap force. Twin Flight 1.05 Update
You can also play with just one bird alone if you like, thus allowing Flappy Bird addicts to custom modify the game play to their liking and train on super hard or super easy modes.
Also, you can have fun playing multiplayer mode by setting the pipe separation very tight, and each player controlling one bird.