Nice job, but that polka‑esque music makes me want to feed myself to the yeti as quickly as possible. :)
You might consider a mechanic where moving your character in a sinusoidal pattern works like building up blue sparks in Mario Kart rewarding the player with a temporary speed boost.
Another SkiFree homage that was posted a while back on HN that has a nice pixel art aesthetic:
https://broski.winterpixel.io
