Very Tainted...GOOD!
First off, by tainted I mean like rusted but full of potential in a good way.
Though you've done an amazing job with this piece and you shouldn't stop. The piano line is really good. C-Minor is my favourite key by the way XD. But with the piano line to give it some finesse, I'd recommend some chords to help the melody. If you don't know what I'm talking about, check out a couple of my songs (I recommend Home (Keys of a Piano)). I'm not trying to advertise myself but I don't know how to get my point across any other way.
Now, when I said before rusted with potential, I meant this song should be a lot more passionate. I was expecting a much bigger climax. Again, chords are your friend. I do like the bass line, but in a classical song you should leave that to the piano.
But an amazing piece. Give me more when you upload!