RE: Icy's Frozen World
Your first piece is really nice. It has its atmosphere, and you can feel the cold from this world: it has more shadows than light, the blue dominates the whole terrain, as it says nothing could live on here, not even the nature. The drawing technique also makes this statement stronger, as the lines are also creates a bit windy effect, making it more... "brutal". The mountain also reflects totally well that nothing could live here: even the strongest, massive object is alone in this ground.
The second one is really realistic, however, it doesn't give me the feeling of a planet. The shapes are perfect and also you played well with the dark/light effects (even thought I feel that it's a bit too much from the shadows), the mono-coloring doesn't work for it. I guess you should add another color, even if it's just a secondary color (like brown, black, white, and so on), since now even with the lines and dark/light effects cannot be seen because everything is one-colored. Adding some more darker and/or more lighter parts to the planet would make it more realistic, and more important, it would look like as a real planet. I know I said that at the top, shadows are a bit too much, then I say there should be darker parts there, but there is a difference between that the lighting is darker, or the planet itself has different relief.