The melody itself is good, though you repeat parts of it a bit too much imo. The volume also seems to waver in and out throughout the song to such an extent that more than once I thought you were just fading out to end it, except it came back and kept going. I'm not sure why you'd have the audio do that, like if you were trying to simulate softer notes or what, but it's really distracting as it is and could use some work.
But yes, the piano sounds nice and I do like the melody. The details and production need a little work, but otherwise there's not much to complain about here.