Where did you get the stunning lock screen pic?
...when I click the collapsed Tile Group all the way to the right, it expands to what the phone used to look like... basically my original "Start Menu" ...
Here is mine:
http://i.imgur.com/SIz0pgk.jpg
Opening the folder continues the pattern:
http://i.imgur.com/fpJIYki.jpg
I would do full screen image but the light theme messes with that. I prefer light theme.