Yume Nikki
Madotsuki lives alone in a small apartment with a bed, an old game console, and a desk where she writes a diary of her dreams. The player controls Madotsuki and can move her using the arrow keys. If you make her go to sleep by interacting with the bed, she goes into a dream version of her room. From there, you can make her explore 12 different dream worlds by going through doors that are in a large, dark place north of her room. From these worlds, other dream worlds can be accessed.