Not bad, but wrong category
Sorry, but it's the truth. Except for the snare entrance and the strings theme, this has nothing to do with classical music.
I understand that this is your first attempt with this kind of music, but you should try hearing other songs from the same category you're about to submit it to, just to see if it really is the right one.
Other than that, the song has a nice progression into it, but near the end, it stops to change and the theme gets a bit repetitive, wich, after a few listens, gets pretty anoying.
Think about changing that, put an ending and submit it in the good category next time and you're sure to get much better reviews!