Overall,
There are a lot of good things about this piece. You pay careful attention to the melody line, and it is continuously developing into full phrases and thoughts. I do have some constructive criticism however:
Your harmony is also good, but sometimes it one good chord would go to another strange/out of place chord. Also, there is a strange break in the bass harmony in the very beginning. Since you are using a lot of mixture and applied chords, any out of place rests or stops will break up the harmony and sound strange.
I like the amount of detail that you are putting into your dynamics and expression. It helps this through-composed piece flow seamlessly from one thought to another. I like the style, very jazzy, but still light and thoughtful.
Good work! I hope to hear more of your work! :)
~Smartpoetic