Hmm... I enjoyed the 1st half, the 2nd half was more messy, most after rehearsal G. This piece has a lot going for it, it has quirky melodies, energy...one important thing it lacks is focus. I think this piece deserves a more grand ending than the current one...it just feels too sudden and random.
Orchestration is alright, though I'm concerned some of the wind solos will be drowned out easily. Also, you won't get much pitch from those high violin pizzicati, I think a better substitute would be bells...or harp doubling or something.