Really fits the theme well! I like the chill vibes of sailing the sea!
Like others have suggested, water could really be spruced up, but you already know that. Maybe extending the water where the map ends and stopping the player from leaving with a collider would also help? Seeing the edge of the water is a little jarring, especially in a relaxing game like this. I'd also suggest a sound for discovering an island.
Good job overall, really nice to see a minimap implemented.