PolyFauna is a new app from Radiohead — yes, the band Radiohead. The free app has an expectedly vague description. Basically, you hear clips from “Bloom” off the group’s 2011 album The King of Limbs while guiding yourself through a strange, open landscape. Touching the screen creates different textures as you swoop around. Following the red dot will take you to new areas. It’s a very Radiohead kind of app. DotEmu has brought…