This is a fabulous effort. Many of your ideas are consistent with classical schemas and, even though there are obvious direct influences with Mozart, your application of such ideas is well considered.
Monarchean has rightly pointed out that some of your harmonies could be less static. You have the chords right in most places, although there is a lack of harmonic fluidity and indeed character, the latter of which is something one will develop with further practice.
Thanks for sharing and I hope to hear some more of your stuff soon!