Just not to repeat criticism, I find flute rapid notes very nice and a bit underused (though this might be not the best case for extensive developments). The piece is, well, a bit short to my taste since it seems that something wants to begin around 1:20 but it doesn't; the piece ends instead, but since it is required by the competition not to be longer than 90 seconds I cannot really complain, you've done good with the time given.
Regarding the sound, it's solid and I really like it. May I ask what kind of software/libraries have you used for it? I'm very much used to writing my music in paper or using engraving software but it seems that achieving proper sounding for orchestra (without actually hiring one) requires much more than musescore or similar software can produce in terms of sound...
Kind regards and thank you for sharing!! Hope you get into the finalists group at the very least!