Long maligned as anti-social escapism for sulky nerds and introverts, video games could be a way to feel happy, at least temporarily, according to the University of Oxford. Or one game, at least: Powerwash Simulator (PWS), the playing of which appeared to put 7 in 10 the gamers studied in a better mood than when before they picked up a controller. “We find that playing a popular commercial video game, PWS, is linked with a small improvement in mood,” the researchers said, in findings published in the journal Games: Research and Practice. “People feel good playing video games,” according to Oxf…