The beginning is very atmospheric and I like the solo melody. Just the high strings are a little too loud in my opinion. The part around 0:46 also has a nice feel to it, though the melody in the strings could be a little louder compared to the chord tones.
The legato wind instrument starting at 1:10 is delayed a bit, which stands out because of the arpeggio playing at the same time. This is common with legato instruments and can probably be fixed easily by setting a negative track delay on the wind instrument (usually one has to experiment with values between -30ms and -150ms). The same problem occurs starting around 2:20 and in the brass starting around 3:43.
The part around 1:40 is great with the full orchestra repeating the theme.
The brass chords starting around 2:35 sound a little fake to me. Maybe because the notes are held so long. I don't think brass can play as "pads", unless maybe if they play really quietly.
The buildup to the finale has a nice brooding atmosphere. The finale itself could use a little more excitement dynamics-wise for me. Also, the percussion is a bit repetitive. There are some very good harmonic and melodic ideas in that part, too.
Now, my points are just some ideas for improvement. All in all, nice work - keep it up!