Addictive and irritating in equal measure, Flappy Bird has proved to be a surprise hit in the competitive mobile phone game market, attracting more than 50 million downloads and hooking users into a time-consuming challenge now renowned for its difficulty.
But its creator has now taken the game offline, after complaining with a choice of words that sounded more like one of its exasperated players than its maker: "I cannot take this anymore."
Sure enough, at 6am today the game became unavailable to download - first appearing on the app store with an error message, then gone from search results altogether.
Nguyen had previously suggested that his life had become overrun by the success of the game, which has achieved a global following despite its basic graphics - often likened to the old Mario Nintendo games - and simple premise of flying a bird past a sequence of pipe obstacles.
The revenue from advertising in the game, which is free to download for iOS and Android users, has been estimated at close to £30,000 (NZ$59,000) a day.