I don't see any sign of a win condition. The game just goes on until you run out of life, and since the snowman AI is so bad, the only way you'll die if you decide you've had enough of the game and just commit suicide by letting them swarm you on purpose.
you can easily don't move in the beginning and shot every snowman under your platform
Unfortunately, we didn't have much time to program the snowmen's AI, so they ended up kinda dumb and easily farmable. :\ Hopefully that didn't take away from the overall experience of the game!
Would be nice if the Snowmen had health and there was a pause and mute button.