Phobia

Overview
Phobia is a Yume Nikki fangame made by Water Pary (清水无音pary) (Pixiv). The game is still in an early state and has no endings.

Gameplay
"The game is not finished at present and only has a few maps and several effects. You may see a sign with word 'UNFINISHED' on it in some maps. It means there is an unfinished event or map here. The game has no ending and 4 effects now. The computer in the real world can be used to save now. 'PICTURE' and 'OPTION' cannot be used."

[Taken from the game's English Read Me file]

Plot
Phobia stars yǐng zi(影子) (or Eiko or Kageko?), a girl (女孩子 = female child) with extremely long purple hair who refuses to leave her room and prefers to explore her dreams instead of reality.