After the actual Flappy bird being pulled out from the mobile app stores, I found this crazy game online developed by  a developer named Mr. Speaker. the game is exact same flappy bird with an additional difficulty. You need to type the text appearing on the top instead of just tapping your mobile screen. Please dont bang your computer screen if you cant score 2. All the best.

Source: http://www.mrspeaker.net/dev/game/flappy/

Flappy bird typing tutor