When opening my primary world the GUI shows, and you can kinda see some torches but everything is black. The fact that touches show proves that I'm not just in a black cave. It is a world I have played on a lot with a few multiplayers as well. In the screenshots I don't have anything because I just respawned. I have not been able to use the world since I respawned.
The app is also really laggy. So much so that I can really pan around or walk. I can look though my inventory and stuff, but that too is slow to load.
The world seemed to lag after the 0.16.1 update or maybe it was even the 0.16.0 update. Then I died and after that its not even usable.