The game sat silently on the app marketplaces for half a year before it was suddenly picked up by the masses, becoming a massive hit – so massive that, at one point, it was making $50,000 a day.
A long-time Mario fan, he reached out to his favourite title for inspiration – and sprites – to create what turned out to be his magnum opus: a side-scroller game that was surprisingly hard. Dong Nguyen released Flappy Bird in May 2013.