Thanks for playing anyways!
If you do want to keep trying, it sounds like there might be something unique-looking you didn't inspect in another subarea there...
I'm stuck at the same point, what do you mean by "subarea"? what do you mean by "unique-looking"? I've looked in every cave in the white coral zone. I have the flute. I've seen the crystal. I don't know where the depths is. I've seen the slate. I've seen the path on the wall.
At this point I feel like I'm brute forcing finding the next clue!
I was referring to the first person areas. The flute is what I believe they were missing.
You, however, sound like you've got 2 or 3 puzzles available to you that you can solve. There's a subarea in the coral zone you haven't mentioned going to, and some things there you may not have figured out using one of your newest items.