'Flappy Bird' is back – but with a murky comeback story and without its creator

Ten years ago, a simple mobile game called Flappy Bird took the world by storm. The game became a massive hit in early 2014 on both iOS and Android, and quickly brought its creator, Vietnam-based Dong Nguyen, fame and fortune. Flappy Bird at one point was reportedly bringing in tens of thousands of dollars in ad revenue per day.By February 2014, however, Nguyen had completely removed the game from all mobile app stores. Others have attempted to clone the game over the years, but were never able