sometimes that happens to me so delete mcpe dont worry either worlds are saved and then download it again also i wanted to make a new texure pack and was wandering if you or anyone wanted to join me, my kik is TheMMagicWiz14, if you wish to email my email is [email protected]
Thanks...
http://www.minecraftforum.net/forums/minecraft-pocket-edition/mcpe-mods-tools/2610428-0-13-emeraldcraft-metalurgic-gems-alchemy
http://www.minecraftforum.net/forums/minecraft-pocket-edition/mcpe-mods-tools/2610428-0-13-emeraldcraft-metalurgic-gems-alchemy