I guess I'll go to the corner then. I really liked Song of the Deep, especially after it got patched so I could actually finish it since the Deeplight locked me in.
Some of the puzzles were pretty clever with little to no hints in game, and I liked the narration. It gets pretty dark actually, literally and tonally. The map is also quite large, and I found the art and music to be really nice.
But if you only played until you got the seashell to breath underwater then that's like idk 28% of it at most.
The one issue I had with it apart from glitches that were patched anyways, is that the final boss was way too easy (I played on Advanced for my only playthough) and that you get nothing at all for collecting the 200+ hidden treasures. Some are quite obscure and difficult to get too.