This is a nice piece. You are right, at times, the tonality does sound a bit odd (Espically in the opening measrues and again near the middle) and you do use a fair amount of chromaticism throughout. I hesitate to call this original but something about this does strikes me as different than what I'm used to hearing around and diversity is always welcome. Out of curosity, what samples did you use for this piece? They aren't the best, some of the higher notes seem a bit harsh on my ears and I don't care much for the pizzacato strings but overall, they sound pretty good.
Also, I can't help but notice that you've been here close to two months but only have four posts. Something that turns off a lot of new members from this site is that they make a few posts, they don't recieve much of a response, then simply never log in again. If you want more comments on your pieces, I'd suggest listening to other people's and then commenting on them. It doesn't always work but I always make it a point to comment on anyone's music that has commented on mine (assuming they've posted something here) and there are plenty of other people who hold themselves to the same standard.
Anyway, hope you stay around. You write interesting music and it's always nice having new members.
