It carshes

I have been playing minecraft since version 0.4.0 yes that is like 5 years ago, i have about 23 maps that i want to play but each time i try to play them it just goes black and then kicks me out of the game,no matter what i try it never works,Im not sure is it because my ipad 2 is old but its weird. Thank you

Shwan handren about Minecraft: Pocket Edition, v1.1.4