This looks like an interesting premise for an old-school arcade game. Nice music. The main character and the snowmen both look cute.
I tried the game 5 times, but each time I died in 1 hit and had no way to continue. Instead, I had to refresh the page. This is far too unforgiving. Multiple lives or hearts would have been good; infinite continues would have been even better.
Also, the controls need more calibration. Movement felt stiff, and jumping didn't quite feel right--it felt like I always fell to the ground too fast. Also, I couldn't figure out how to go down ladders.
Lastly, thematically it felt like lighting a furnace should melt the snowman sitting right next to it, but that didn't happen. :)
Nice effort, and good luck with future jams!