Unlike the people below me....
Imma actually do an actual critical review.
1) Bad choice of drums and drumbeat if you want to do classical. It ends up sounding more hiphop than classical. The drums need more reverb too. Instead of using a kick, you probably should have went with a tom if you lack a good orchestral drum set.
2) I don't like the flute melody. There's something about it that just doesn't match up for me. Maybe it's the way it clashes with the chords.
3) Sounds too basic for me, in terms of this being a classical piece. Classical is one of the hardest genres to compose. Trust me, I've done a few classical pieces. There's just a little too much looping for my tastes. Not varied enough. And that contributes to the hiphop feel of this song.
But it's not bad for a second attempt. The theme is good, the instrument choice contributes well to the theme, and the dynamics are okay.
And if you have any more classical pieces, let me know.