Flappy bird 2.0 by ales-kotnik on DeviantArt

Flappy Bird developer says he took down game because it was addictive - Los Angeles Times

Code.org

flappy bird 2 - Techweez

Flappy Bird Is Gone From The App Store

Flappy Bird Chrome

Behind the Vietnamese in-group hostility towards Flappy Bird

Flappy Golf 2 now available for your Android device - Android Community

Bitmonkey Games

Flappy Bird V2

Developer Behind “Flappy Bird,” The Impossible Game Blowing Up The App Store, Says He Just Got Lucky