I like that very Waltz-y feel it immediately has to it. (oom-ta-ta).

What stands out immediately is the copious amounts of reverb. It sets an interesting atmosphere right at the start.

As other elements come into the song, I feel like this reverb might just be a little bit overkill. I'd keep it for a sort of interlude. You could create some interesting dynamics by making the backing track (which is what I consider the reverb-bathed stuff as) not a constant presence.

Enough about that; I like that layering of multiple instruments you've got going on, it works together well. Nice use of panning too, although I get the impression that the right end is more populated than the left (listening on headphones).

The ending was well executed too. No simple fading, but well done gradual elimination of instruments.

Good job, I liked it. :-)