The snowballs are a really fun central mechanic and I enjoyed using them, though some of the platforming was very difficult for me or inconsistent, since your current velocity heavily impacts your additional snowball jumps. I love the art and music, great cozy vibes.
Very impressed that you managed to put this together with so many people and not have it feel like a jumbled mess!
I did get stuck on the first screen with blue snowballs because I had no way of getting up to the fire so that I could die, and the level was unwinnable because I had used them. A reset button would have been really nice!