several French newspapers such as 20 Minutes and Metronews accused Flappy Bird of being a clone. The reporter from Thanh Niên Online tried playing Piou Piou vs. Cactus and confirmed that the similarities between the two games are astonishing. The French developer of Piou Piou vs. Cactus, known as Kek, told Pocket Gamer that he, too, noticed that Flappy Bird is "very similar" to his earlier game, but when he contacted Nguyen about it, Nguyen claimed that he did not know anything. Technology editor Patrick O'Rourke of Canada.com also charged that Flappy Bird is "almost a complete ripoff" of Piou Piou vs Cactus, as well as that its primary gameplay mechanic is a "rip off" from a game called Helicopter Game, and that it heavily borrowed sound effects from Super Mario Bros. games. Legacy Since the game's removal, numerous remakes and parodies have been spawned, such as Sesame Street's Flappy Bert and Fall Out Boy's Fall Out Bird. Flappy Bird became one of the most cloned games in Apple's App Store. At the peak of its popularity, over 60 clones per day were appearing on the App Store, prompting both Google and Apple to begin rejecting games with the word "Flappy" in the name. CNET reviewed seven "Flappy copycats" for iOS two days after the original game's removal, describing the options as "pretty bleak", but singling out the underwater Splashy Fish as the closest approximation of Flappy Bird. Shortly after the game's removal, security researchers warned that some versions of Flappy Bird and its imitators available on alternative Android app stores have been found to contain malware that can lead to unauthorised charges to a user's phone bills. The number matching game Threes has been compared to Flappy Bird because of the similarities between how people react to them and by the chain of clones that they are both respectively part of. In February 2014, the non-profit computer science education organization Code.org unveiled a set of lessons that would allow the student to make their own Flappy Bird clone. Nguyen's other games Super Ball Juggling and Shuriken Block ranked at 6th and 18th respectively on the App Store during early February 2014 on the back of Flappy Bird success. He revealed in March 2014 that he is currently developing three other games, in similar formats to his previous releases. One of those games was released in 2014 as Swing Copters