I've been giving myself a new challenge instead of always playing creative or chilling in a house on easy. I've been doing Hardmode. This is an issue that can be solved by forcing a game crash through task manager. What happens is, I'll fail, and get killed. Then, when I click to delete world, it brings me to the main menu but no background, just white. I'll go into single player, then click on the world and delete it. Then when I go to create a new world for the challenge, in the world customization menu, the previous world is still loaded but in the background. When I get the settings right and click create... It goes to a black screen. I haven't waited long enough to see if it fixes automatically over time. (cause I am impatient at times)