I like the idea! Although, the controls feel a little unintuitive. (I expect A to make me go left, and D to make me go right)
Also, I feel like the game is a bit too difficult for me, but that won't affect the rating obviously :)
I would have loved to see some pre-made levels, so there is a learning curve to the game, with some nice music maybe! I think you can build a nice game on this idea! Maybe, upgrades and things I can attach to the snowboard? Anyway, of course that's only if you plan to keep working on the game. Nice job!