5 stars, then 1 :-(

I loved this game, and it was my favorite. So fun and creative. Five out of five stars! But now I cant play. I tap on my minecraft app, and then after the "Mojang" logo, the screen goes completely white and it doesnt let me play. Ive tried deleting and redownloading the app, and shutting off my phone, but nothing seems to help. None of my friends seem to have this problem! Please help!

HATE ET about Minecraft: Pocket Edition, v1.1.5