I gave it a 5, this song deserves a higher score
Wow. This is very well arranged. It would be perfect for a movie scene or video level based in, as you put it, frozen forests. I'm definitely getting that solemn winter vibe from this.
On a different note, what software are you using for those instruments? Is that Edirol Orchestral? Very nice sounding and high quality.
I really don't know what to tell you to improve, as far as I can tell this song has no apparent room for improvement. The ending was great. Maybe for structuring sake, add in a changed-up section near the middle of the song, without the oboe, and try to establish a more serene mood with some different instruments and some same, then build it back up. Just a thought, not a problem with the song. So here's a ten! :D
If you could review or at least listen to a song of mine, it would be awesome, because I don't get much feedback. Either way, hope to see you submitting more in the future!