This game heebied my jeebies, very unnerving vibes. I feel like it could use some creepy challenges or other features, though that might break the feeling as the uncertain becomes more certain. I really liked the idea of leaning so hard into the metroidvania genre that the whole map becomes a small space.
I feel like the dark areas could have been an obstacle with a flashlight ability, but as you said you ran out of time.
A lot of the dialog felt like it was trying to tell the player how to feel. Show, don't tell, the environment did a decent enough job at it.
The interactions felt janky, particularly when interacting with a door and a light switch at the same time. I recommend establishing a priority order and picking one to interact with, reflected in the prompt of course.
What made it unplayable: I hit E 100 times at the end and didn't get more funny dialog
Overall, quite enjoyable, very impressive to make a game that elicits such a strong fight or flight response in just 4 days.