First of all, welcome to YC!!
your piece is fresh to my ears and very colorful. I like your material as well as your evenness of the instruments (i.e. they all play an important role) i havent listened to that much Stravinsky, but from what ive heard you seem to be able to grasp his style as well as put your own authenticity into it! Nice work!
however, this piece seems largely unfinished to me. if it is an unfinished work, it belongs in the incomplete works section. if you want some advice on how to expand it, i would continue with your "B" section you have going on, after the repeat that it. i would give it stronger roots in the melody, but idk, maybe you did that as in i cant really tell because of the midi. the rhythm seems to outweigh it.
if this is completed in your eyes, then so be it, like i said i enjoyed this immensely, especially your rhythm. i strongly urge you to continue writing this piece, its definitly a different flavor then some of the works i have heard here. If youve planned out a form for it, i would be interested in seeing it, otherwise, if i were you i would have some type of form in mind, it gets past some writers block issues (for me at least)
All in all, very nice work! i gave it 4 listens. 1 to hear your music, 2 to figure out my comment, then the other 2 because i just enjoyed it! Again, welcome to YC, you surely have talent and i hope to hear more of your work
Vince