Striking it rich with an indie video game hit may seem like a dream come true, but a quick look at lotteries and professional sports shows that a windfall can be difficult to handle. Perhaps unsurprisingly, game developers whove turned rich overnight have struggled to grapple with the sudden onslaught of attention, pressure, and — yes — even cash. Dong Nguyen, the maker of Flappy Bird, may be the most notable example (his simple game was pulling in some $50,000 a day before he pulled it from the App Store), but The New Yorker has interviewed a number of other developers about their struggles. …