When opening Minecraft, I am able to select the "Play" button but when it kicks over to the screen with all the worlds listed, it will not let me select one of the worlds already created and it will not let me create a new world. None of the buttons on the screen work. It started on Saturday but it was intermediately; now it does not work at all. I have tried it on Single Player and Multi Player will not load at all. Please help correct this issue as my son has not been able to play his favorite game.