After reading /r/gamedev on Flappy Bird I got quite disgusted by their community. I hope doesn't represent the whole game development community. They seriously compared Flappy Bird to more in-depth games and took its success as some kind of threat without even realizing that short and addictive entertainment does sell. You can't compare Flappy Birds to "bigger" games, it just doesn't make sense. Flappy Birds is an amazing game in its own right.