It's a good start, but there is room for improvement in a few areas. First, work in a higher resolution to give your piece a high definition look. Second, the shape and proportions of your subject matter seem slightly off, particularly on the right shoulder and the proportion of the right arm but not by much. Third, the face I don't think is shaded correctly and the nose looks off because of it. Forth, the subject matter is an Ice Queen, but I feel that subject matter lacks that feminine feel, mainly in the face like the lack of noticeable high cheek bones or long elegant eye lashes and slender but sharp eye brows. Remember, girls like to look beautiful and she is a queen so that elegance can be exaggerated. Also focus more on the Ice Queen theme, because there isn't much in the piece that suggests it. I only know she is an Ice Queen through the title. Show me she is an Ice Queen, don't tell me. The hair could also be improved upon with a few individual strands dangling down here and there (Elegantly of course) because hair isn't that block like and neat. Hair is flowing and combination of strands going in certain directions with quite a few strands sticking out. look at reference photos of people's hair and see what I'm saying. Some highlights in the hair would also make the hair look shiny and glossy. You've tried to add shading and shadows, but those shadows could be darker to really show off the form and shape of the subject matter and it would give the image more depth. Texture is also something the piece lacks in, for example I can see there is a metal medallion clasped onto a fur trim. I can see a hint of highlights where the light is reflected, but metal doesn't look like that because of it's surface and texture. If you look at shiny metal images you will see the dark and light streaks of caused by the surrounding environment and light hitting it. Same with the fur but the surface of the fur is vastly different to the surface of metal, but texture really gives the subject matter finished and realistic touch. If in doubt about how these textures should look, look at reference images and analyse them. The background could also have more snow flakes with the snow flakes becoming smaller and more faded the further back they are in comparison to the larger white dots nearer the subject matter. This would also give the piece more depth. I do like the eyes though, which are quite hard to get right and I love the mystic blue glow emanating from them. Overall you have a lot of potential, which I can see already, but with a few alterations here and there you can make a good piece into a master piece!! :)
P.S. I feel like I have been really harsh, but I swear I was only trying to give helpful tips :P :)

I really did not know what to expect at first glance but this just made my day. I like the art work and its style too. A very funny visual narrative.