Hey, I've just listened to your track!
I really liked your melody. It's beautiful, memorable, and works very well with the harmony. I also enjoyed the way the piece evolves over time; I never felt bored, even during a 3:30 piano solo (or duet, at times).
One thing that stood out to me is that the left hand feels a little heavy. In particular, the chords on the second and third beats of the measure sound a bit too low for a waltz style. As for the right hand, I think adding more velocity variation could bring more expression and make the performance feel more natural.
Overall, I really enjoyed your submission.
Good luck with the rest of the voting period!