HONG KONG, April 28 (Reuters) - A new game released by "Genshin Impact" developer miHoYo this week has become China's top downloaded app, reflecting pent-up demand as gaming giants restart flagship launches with a crackdown on the industry easing. The blockbuster debut bodes well for several other games due to launch this summer in the world's largest video games market. As of Thursday, the Shanghai-based company's strategy game "Honkai: Star Rail", where anime characters battle space monsters, had amassed 20 million downloads across smartphones and personal computers, miHoYo said. The game scored more than 1.6 million downloads on smartphones in...