I was playing in a singleplayer hardcore world messing around using the cheats thing where you could open to LAN and turn on cheats then go into creative, then I got bored and went into survival and killed myself. I proceeded to click the "Delete World" option relatively quickly and I got sent to the title screen but the whole background was white. I have no texture packs on at the time and whenever I press the "Options..." button it brings me to the options screen that you would see in a word, not at the title screen.