One of the better entries I've seen! The movement is satisfying, the sound effects are really cool and the background music fills in the silence. The game's gimmick is incredibly simple, but really cool. The tutorial text is really well handled - I know what I'm doing and it's not ugly, so that's even better!
You absolutelly nailed the snawfall effect - I felt colder just looking at it! I love the way the snow piles up over time - I lost because there were so many layers, they covered the gas station entirely! (round 11). You could turn the difficulty up a fair bit though - maybe if there's too much snow on the platforms you loose, or something of the sort? As much as the plowing was fun, the only thing stopping me from reaching round 9999 was my patience.