Madoro-Mu (まどろ夢)

Overview
Madoro-Mu (まどろ夢) (lit. "Window Dream") is a Yume Nikki fangame created by Tumehagi (爪萩) that features a protagonist named Isokishi (いそきし).

Like most fangames, Isokishi starts the game in her bedroom, yet she can use her bed to save the game and actually leave her room.

Gameplay
Rather than having a nexus full of doors, Isokishi's nexus consists of three windows. One is nailed shut until later in the game. Isokishi returns to her room by sitting down and nodding her head, possibly sleeping.

There is little to no sound in the game.

Plot
Isokishi seems to be already dreaming, or possibly stuck in a dream since you can enter the nexus right from her bedroom door.