I didn't realize the player character rotates at first - I love the monochrome, but I think it might have worked a tiny bit better if the player character was the same family of blue but a lighter value, instead of being a similar value but slightly more purple. Also, it's very quiet lol.
I do love that the fish feel really well weighted in terms of difficulty to catch, and I think the feedback for the line breaking was really clear and easy to understand.