Flappy Bird is the most played and most controversial game ever came across in App Store. This game was so addicting that most users were become obsessed with Flappy Bird. Well for sure we have never seen something goes as addictive as this game but unfortunately the maker of this game removed as some source says that it is so addicted and Parents wanted this game to be removed because kids were doing nothing but playing this game all the time, while the other says that the developer that made this game has got so much attention that he even can not get out of his house without going unnoticed.
After that time other Flappy bird version games are introduced but never got popular like the original. After this much time I have came across "Impossible Flappy - Flappy's Back". This game is even harder than the original and got 100,000 ratings in App Store in no time with averaging 5 star. As the name states this is Impossible to play and had addicted lots and lots of people.
The game can be visited from here
https://itunes.apple.com/us/app/impossible-flappy-flappys/id845040429?mt=8
The success of this game is still mystery as it is only based on original flappy. Game has new option to get 1 life up to make it more interesting.