Flappy Bird is the same concept as "helicopter game", and others, but the gameplay is novel to the extent that it's maddeningly difficult. And the pipe design i

Flappy Bird is the same concept as "helicopter game", and others, but the gameplay is novel to the extent that it's maddeningly difficult. And the pipe design is a blatant Mario ripoff. A rule banning derivative games could have easily caught Flappy Bird in its filter.