I've run the game like... ten times now, trying different options in different orders. It seems pretty clear that I'm meant to be interacting with the objects, since that's where the story is, but I haven't managed to find the other ending. This is pretty frustrating!
The story is engaging on the first few times you play it, since you start trying to fill in the narrative gaps yourself, but... once you've read all the options, it starts to get extremely monotonous if you aren't having any luck finding the "secret" ending. I think there may be a timing component of it, but I'm simply not patient enough to find it. I've had the thought it's not there at all and the lack of narrative resolution is meant to reflect how the people looking for their missing loved ones feel, which would be clever, but I'm not sure that's how it's meant to play...
As far as gameplay, it's pretty simple, which isn't bad. The atmosphere is really well-done; I think part of the reason I got very impatient with it (even though it's fairly short) is because the background sounds were creeping me out and I just wanted to know the answer. The sparse descriptions make it easy to let your own brain fill in whatever it finds creepiest, so the writer clearly knows what they're doing there.
This game is interesting, but I don't think it's for me.