Interesting atmosphere and implied story.
The fishing mechanism is quite rough, and being the only activity in the game it could use some improvements : the progress while the fish is in the circle should be faster and the loss while outside slower; for several times the circle ended up outside of the field of view, especially when fishing too close to the boat.
As it is now it drags the game, stretching what could be a ten minutes tight experience into a potentially endless frustrating chore