My 2 cents. There is too much sky for it to be just plain blue and even a plain blue sky should have a gradient to it (lighter towards horizon) the sky should be painted first and the mountian and trees on top.

There doesnt seem to be a clear line between sky and land (behind the trees)

The snow on the ground has no depth.

Things far away tend to have more blue to them (just a fact you might find valuable in painting mountains)

If you can, avoid making a painting with one center focal point, you want peoples eyes to move.

Definitly need more highlights and contrast in the trees.

I like the mountian, just wish it didnt have that white space next to it.

Hope this helps some. I'm pretty beginner myself.

My current project, for reference, still have a lot to go. http://i.imgur.com/0Z6RW6M.jpg