Very cool! I enjoyed playing. I like the music and the atmosphere.
The snowmen seemed to be trying to throw snowballs but most of the time nothing would happen. So I think it would be great if you make the snowmen act scarier by making them move faster and pose more of a threat to you.
Also you are able to jump so I think it would be cool if you make more of a 2 dimensional aspect to the area. Maybe add some places to jump onto or some ramps and bridges.