hey very nice. One trick i may suggest is not hard panning the piano right and left, place it more narrowly in the mix. I dont know if all the element variation is a good thing here. The flute may be a bit loud. The piano is so nice by itself that you may want to let it shine. Well done.
Good MIDI work. The instrmentation is fine -- you could even let yourself go a bit more, next time. Pleasant theme.