Sign up to receive each week’s Playlist e-mail here! Also check out our full, interactive Playlist section. TOUCHTONE (iOS) BY MIKENGREG Greg Wohlwend and Mike Boxleiter are outraged at the erosion of privacy in the post-Snowden era. But rather than stepping up to a soapbox to rant about it, they made TouchTone: a puzzle game about a fictional government that crowd-sources surveillance of its citizens to protect the state. You bounce lasers around grids in the game’s increasingly tricky puzzles to gain access to emails and text messages that you then deem pertinent or not to the government’s fight against terrorism. It evolves…