This was so lovely - especially the transitions in weather; that was especially impactful. The conversations also felt organic. And the ending I got actually reminded me of the game I created, although it's very different.
This is a very small suggestion, not sure if it's helpful - for reinforcing the feel that the boat is moving through the water, something as simple as a minimal background in the horizon moving backwards to indicate the ship is moving, can possibly help!
Either way, the themes you dealt with were so much bigger than that; overall it was a good, good experience!