Whoops, so I wrote this review before getting to the final level, reached the final level, and realized I immediately had to come scurrying back here to praise it in particular. I mean this with full sincerity, that's brilliant level design. Especially liked the space it gave to turn over and over that last line of "dialogue" in my head, really powerful writing.
[Spoilers for the ending:]
One thing I will say in the interest of being thorough, just because I commented on the content warning in my original post: If you decide to upload a post-jam patch, would you consider adding a jumpscare warning to the list of content warnings, and/or to the game page somewhere? I realize that that may take away from the surprise at the end a bit too much, but the rest of the game's content is definitely enough to make the player believe that the subject matter and mild flashing/loud sounds on "explosion" are all that they're about, and unfortunately in the inclusion of a content warning the implication is sort of given that the content warning covers all that could be potentially distressing for a player.