4185113, or 4-18-5-1-13 - DREAM, is an online flash Yume Nikki fangame. It is one of the only online fangames. Another would be Dream Continuation.
Side scrolling flash game. You play as some sort of black and white stickman. Due to them having no name or features, they will be referred to as the protagonist of this game in this article.
It is unknown how the protagonist got to the room they start off at and what kind of place it is anyway.