The art direction on this game is amazing. Simply astounding! The cool color palette with the splashes of orangish yellow and red really capture the feeling of the crispness of winter. Your gameplay is solid, although I had a hard time launching rocks at any angle but one. The music is perhaps a little repetitive, but I'm not going to mark you down for it :)
All in all, a masterful, cohesive blend of core mechanic, excellent graphics, nice sound design, and good programming. I expect great things from you in the future! Keep on doing what you do, please!!