Sign up to receive each week’s Playlist e-mail here! Also check out our full, interactive Playlist section. PLUG & PLAY (iOS) BY ETTER STUDIO At first glance, Plug & Play is a game about binary opposites. The screen flicks between black and white, and the primary actors are male and female plugs and sockets, but from there things get complicated. Plug-headed, finger-limbed humanoids plug into other plugs, or absorb their prongs and become sockets. Connections that are made are fleeting, and far from tender. The plugs and sockets drop onto the screen hopefully, looking for a partner, but the tiny finger people that…