Because of the central game mechanics, there's probably only a certain number of people The MISSING is really meant for. It's a puzzle platformer with a very stressing element core to all of its puzzles. There were definitely some times that puzzles felt kind of obtuse to me, most frustrating when they occurred in the middle of a high-paced moment and resulted in death, but they weren't so annoying as to bring down the whole experience.
The MISSING is a little bit disconnected from its own central story, as you can probably guess that the plot does not revolve around freak moose genetics. But it's still told well, with extra bonuses for collectibles by expanding more side conversations with J. J.'s other friends. Most of the real dialogue in the game comes through text conversations on J. J.'s phone. To me, this wasn't a big deal because it left some of the delivery of this information to the imagination (something I've been good with in Ace Attorney or Final Fantasy).
I felt like I had a pretty good handle on the meaning behind TMJJMATIOM's story, but I honestly had things wrong, which made recontextualizing things after the ending a very valuable experience. It feels unusual for such personal topics to be brought up by Japanese game developers in this way, which makes this game pretty valuable in my opinion.