I think there's a lot of potential on display here, but a few mistakes are holding it back. I love the depiction of the adventure location: the points of interest are all well drawn and the cell-shaded-looking colour palette has a lot of charm. However, extending that vibrancy into the rest of the module hurt the readability for me. The writing is intriguing at times, but then lacks specificity in the gameable elements. For example, "1. A buoy surrounded by fog traps the players. Every time it is encountered, something about it is more eldritch" -- I'm not really sure what I'm supposed to do with that. I love where the idea is going, but give me a specific detail I can use to evoke the horror.
But I want to reiterate I think there's a lot of potential here, I especially loved the Anchorite Reef and all that it implies, and the Reeds and the intelligent cranes seem like a fun encounter.