A deeply dark and terrifying scenario.
I enjoyed the world building of the settings and peripheral details like that of the MRE and its contents--never really considered that the 'treats' were their own light in the darkness.
The story can use a stronger inciting incident to cause the characters to break out of their established ways. I think there's a lot that can be done with the premise that can pull several components together. I do really enjoy framing falling into each other like being their own kind of gravity.