Hi! @arpeggia. I really enjoyed this piece too! the chromaticism, dissonance, the use of accents which makes it sound as if the strong and weak beats subverts what is typical of a waltz, yet still stay consistent enough to be easily recognizable as a waltz, which makes it a very interesting and engaging! A lot of drama within a short span of around one and a half minutes. Well Done!
I agree with @PeterthePapercomPoser that
would be a good extension if you want, a middle, contrasting part to what already is there.
Thks for sharing!