I had a few worlds and everything worked fine on survival ... had a really big mine a house above water and a house into a mountain... had activated the nether reactor and had the huge thing that it build... those things in my principal world... but today when i wanted to play again the whole stuff has gone... i got nothing but my armor and the stuff i had on my inventory... so what the heck happened? I obviously have the official play store app the pay one... and had played like 3 weeks without prob... but then suddenly this happens to all my worlds ... I am really dissapointed... All the time I've spent... Hope this bug fixes soon... It was like if the world reset to its very creation...