Good job overall! I love the environment and the snow effect! I can tell you're pretty green at art/animation too, but honestly keep doing these jams and working at it and you're on track to improving fast.
I gotta ask why the frozen hearts were there though, mostly just because it feels like it was added just to fit the theme rather than something you would've included naturally to add in gameplay. Remember that the theme is more often than not something to encourage creativity, not some limitation where if you don't follow it to a T you won't do well!
Other than that, keep up the good work man!