Great environment design, great concept, satisfying sound effects, and lovely modeling style! I ran into a bug with the controls where the ship's direction seemed to be decided by its initial rotation after getting inside, and steering with A or D had no effect, so I needed to keep re-entering the boat to change directions. I also wasn't able to leave the port early during the tutorial. Still, the tutorial was effective, and I like how larger hauls of trash require more key inputs; I can see this evolving into a cool series of fleshed-out minigames if you continue development.
Overall, a very stylish and well-considered game with a large scope. Totally on-theme too. This is a really impressive submission!