Well done for 2 hours.
I would say that was definately an evil sounding piece, heheh. And for 2 hours, it's pretty well done. Now, on to understanding the ratings I gave:
Keep in mind I'm generally quite stingy with the ratings.
Because I haven't heard that much classical which follows the dark theme you built your piece around, I would give it a 6. I have heard scary songs before in classical. The beginning seemed to have a more dark ambient feel to it. Bah what do I know.
I've given low on diversity because really there wasn't much diversity in the melodies that I heard. There was some, but not much. Then again, it is hard to create diversity in a song like this but it is not impossible. I suppose it would account for the limitations of 2 hours, heh?
It wasn't the clearest piece I've heard but maybe it was supposed to be that way? I don't know.
2 hours is definately reflected, not in a bad way!! In most ways, that is. But it seems polished enough to be enjoyable to those who like the overall mood of it.
Good luck on future pieces! *gets off the stage before further making a fool of myself*