You can see from the original sketch below that I made a few adjustments to the final piece. I eliminated the naked winter tree and gave the snowman a scarf to help the visual flow from left to right which is really important in this piece. The scarf also helps tie in the gold colour throughout the entire image. The tree was a case where something looks good in a sketch but is obviously out of place once seen in colour.
As an added bonus, this piece has also been made into a handy desktop wallpaper that you can download in full size here.