Put the summary of the bug you're having here

What I expected to happen was...:the world to generate so I could play
Describe what you thought should happen here

What actually happened was...:I loaded up my lego world and it loaded for about a smidge while loading chunks and then closes out of minecraft pocket edition v0.8.1 alpha altogether and goes to my tablet home screen. Happens every time I try and load this world. It happened previously with another world also.
Describe what happened here

Steps to Reproduce:
1. Load up lego world on my tablet and get nothing
2. ...
3. ...