World crashes within 20 seconds from opening

The attached world crashes within 20 seconds from opening. Minecraft Pocked Edition simply closes. Don't have a clue how to resolve this. My daughters love MineCraft but are frustrated that this world is broken. I couldn't find any fixing tool.

 

(Funny anecdote: I knew Marcus "notch" Person while he was developing MineCraft as he worked for me at the time at jAlbum. I'm the founder of jAlbum.