Combination of the environment, screen effects, and music is really good. The snow effect and the lean really sells the effect. I was half expecting to be eaten by a yeti.

Snowboarding feels fun but it's really easy for steering to spin out of control so I found it best to go straight with only minimal turning when necessary. Once I figured out you could just stop fairly easily the game became trivially easy.
I think the game could benefit a lot from some difficulty ramping, and maybe some extra things to break up the monotony, like opportunities for jumps/pickups to tempt the player into taking risks.