Created in 2013, this deceptively straightforward mobile game frustrated players with its difficulty in guiding a pixellated bird through a world of pipes, as it required a feather-light touch. It briefly reigned atop the Apple App Store and Google Play charts for a few weeks in early 2014. But taken aback by its sudden, soaring popularity, developer Dong Nguyen abruptly yanked the app offline, saying it had become too "addictive." Follow the latest in the game's bizarre flightpath right here.