I love the sound of that music box, which one are you using? I've never heard your work before but the first thing I noticed is how great a melody writer you are. The woodwind during the midsection could afford to have a bit more reverb on it! The part starting at 2:40 reminds me very much of Pirates of the Caribbean. In terms of the woodwind on that part, is it the oboe? - watch your timing. Especially on 3:25 and onwards. It sounds like you were writing in free-time because some of the notes come in a little early/late. The melodies at the end were gorgeous. At 4:10 there's two tiny little clicks in the left ear of my headphones.
Really happy to stumble across this though. Will be listening to some of your other tracks :)