Game not launching and gamemodes

Thank you for adding adventure mode. I am still looking forward to spectator mode and barriers! Also, Minecraft just isnt launching anymore. I have 1GB of storage left and it just says "Mojang" then a white screen. I tried restarting my phone and that still didnt help! Could you let me know whats wrong? Thanks!

LZXTY about Minecraft: Pocket Edition, v1.1.3