So many soft songs
This was a good song because it had a very light tone to it and did not try to be elaborate. Of course, this isn't always good because it needs to have more variety. I really did not interpret this as being sad, just something with a soft tune. Now that I listen to it more, I can understand that you were trying to create sad and joyful music at the same time. I like how this gives a visualization to me of delicate fingers going across the piano. It almost seems like it was sung on a flute or something.
In fact, it sounds like the kind of song you would hear a mythical faun performing. You could have more going on, but it's a good tune to listen to. It's especially comforting to listen to this stuff at night because it's so relaxing. This happens to be the end of my work week so what a nice way to start it. Relaxed people should listen to this.