Good but could of been better
This flash had an interesting combination boons and banes.
First of all, character moved kind of clunky. To me the smoothness of any flash is important. If you could improve that, I think it would been a lot better. However on that same note I think you got the drift of snow down almost perfectly. The snow had a good feel to it.
Second, part of the animation was kind of smeared. A good example of this is the area around trees. It just doesn't feel realistic.
The lip sinking was another thing that I think could use some improvement. The way they moved their mouths, reminded me of a bad anime. However I also understand that the human mouth has been giving animators trouble forever. So this is kind of understandable.
Finally, I did like how the character was drawn. I can tell you have spent a lot of time drawing and perfecting the small details of this character. For that I say, good job!