Viability: The mechanics are smooth and introduced well, that being the inventory system and re-playing in order to obtain items or unlock new endings. Enhancing your text was a great decision and it is still readable. However, the glaring issue I have noticed is your transitions through passages. At first I loved it- we start with waking up and immediately go into a "waking up" transition. As I continued to play, it became more of an annoyance if anything. The transition itself works and is interesting, but lower the time between transitions.
Presentation: This is one of the few times the preset black background and white text works! It perfectly encapsulates your dark encroaching theme. The illustrations you do have are ominous and visually compelling. I do, however, wish there was a tad bit more illustration just to push the eeriness. Play with dutch angles, perspective switches. I love your usage of text enhancement as well- it really plays into the story.
Theme: The game itself is thematic in spirit and execution. The descriptions are wonderful and thoughtfully written. There is a clear story and destinations. However, the endings happen a bit too fast. The "escape" ending seems to appear out of left-field as well. I do enjoy the world building that went into this, and the mechanics serve the theme well.
Engagement: I was thoroughly engaged. I encourage you to push on the horror aspects of this. You have a strong, appealing game going on and could be pushed forward with music/audio cues and more! Keep playing with it.
Overall, I really love what you have so far. It would be great to see how this could tie in with your animations in the future as well. Your animations so far this semester have all been creepy in nature- this fits very well with this. You have a strength- keep pushing it!