After updating the game on my iPad from 0.10.4 to 0.11.0 (no idea which beta, but it does say alpha next to it.)
I wanted to try opening the 0.10.x world, but it only shows the hotbar with the items I used the last time I played it, the necessary gui, and no blocks but just the weather color. Shortly after this, the application crashes.
I created another world, left it and tried to play the 0.10 one again, but that did not fix the problem