Take the world from yesterday and write a story in it. if you did not create a world from yesterday create it now.
what happens to the main charater when they change there name?
is the name they choose something they see good for others? does it end up turning out bad for them because of it?
Create a world in which what a person is called affects the person and there lives.
Write a story where the main character wakes up one day having one thing in their life they regreted.
how does this one change affect there lives? (winning the game, turns there life into something worse. getting the girl, they find they regret it now.)
how can you add more twists into the story?