Despite earning what he said last week was $50,000 a day from his mobile game Flappy Bird, developer Dong Nguyen Sunday removed the hugely popular app from distribution.

The free, ad-supported game had been downloaded an estimated 50 million times.

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"I am sorry 'Flappy Bird' users, 22 hours from now, I will take 'Flappy Bird' down. I cannot take this anymore," Nguyen tweeted Saturday. "It is not anything related to legal issues. I just cannot keep it anymore."

Nguyen, head of the small Vietnamese studio dotGears, erased it from Android and iOS platforms, including Google Play and iTunes.

While giving no explanation in his announcement, Nguyen replied to a tweeted question that he was ending Flappy Bird "because how people use my game. They are overusing it," a comment taken as concern over what some have called the game's addictive nature.

Released last May, Flappy Bird by last month amassed more than 63,000 user reviews, averaging four out of five stars. It was propelled to mainstream media attention following a Jan. 23 Buzzfeed.com article titled, "Why on Earth Is This Borderline Crappy, Impossibly Hard Game the Most Popular Download on the App Store?"

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The game requires players to navigate a comical bird through an increasingly intricate series of green plumbing pipes. Critics contended that certain visual elements mimicked those of games in the Super Mario Bros. series. Nguyen, in response to a tweeted question, said, "Ah, I didn't directly stole [sic] something. It is quite an art to doing that :-)"