This had "Animal Well" vibes. Really great puzzle platformer. It took me awhile to figure out the piano mechanic, and that is my only criticism, it needed to be a little more clear on how to play it. But other than that, great visuals and sound. Love the 1 bit style. All the little details like the water movement, water drops and the rope movement all added to the atmosphere.
Great job, this could potentially be expanded into a larger game.