Talking about the changes, Nguyen revealed in an interview with David Kushner that he will make changes to induce a cool down system in the game, which means after every few rounds, the gamer has to wait a few minutes before the game starts up.
Play Flappy Bird Online — the Deleted Game Will Live Forever
However the Flappy Bird is not available for buy on the mobile devices, still there is online edition of game which is free for play for anybody who loses out the chance of downloading it.