Roughly four times out of five, gamers don’t complete the mission, run out of time, don’t solve the puzzle, lose the fight, fail to improve their score, crash and burn, or die. Which makes you wonder: do gamers actually enjoy failing? As it turns out, yes . . . When we’re playing a well-designed game, failure doesn’t disappoint us. It makes us happy in a very particular way: excited, interested, and most of all optimistic.