I think the dev is 烟雨 thanks to him for it.
Normal use of the function:
Camera phone messages
google kit (contacts, Play)
If you do not use the full screen mode, the desktop picture will be extrusion unlock the screen, dial pad, because the resolution of the problem will have white edges
Chrome browser flash back (may use other third-party browsers, such as UC, this ROM is not built-in, please download)
Remember is a alpha stage.
Installation: Wipe everything as you do (always) then flash the zip. Thats all :P
Source Use google translator to english, there is a way how to set up pie.
A video of this OS in action: http://youtu.be/e5BAi4OBecc