Nick Preston decided to call his upcoming series of short adventure games Toryansé after the Japanese folk song of the same name. The song is traditionally sung as part of a children’s game—Warabe uta, which is very similar to the English nursery rhyme game Oranges and Lemons—but has surprisingly dark lyrics thought to relate to a period of high infant mortality in Japan’s history. But it wasn’t only the song’s background that appealed to Preston, it was also the fact that it’s often played at Japanese traffic lights to indicate when it’s safe for pedestrians to cross. “I loved the idea…