I love the flute, it's something I've never really used in a song, this is kind of inspiring me to give it a try. I have to agree with lazybucks tho, the drums were kind of out of place. I use drums in a lot of my piano pieces, it can add a lot to the song. The challenge, however, with adding drums to a piano piece is understand how delicate an instrument the piano is. It's very hard to Incorporated a lot with it, which is why in most songs most instruments, and drums stop while the piano is playing except some strings, or wind instruments in the back ground.
That being said, I love to push the piano to the limit and see just how much you can add with it, it's just about finding that balance.
Good work tho.