The core concept of this is pretty neat, I think; I like the slaloming, and the idea that the default direction of progress is towards the bottom right. These both give a sense that you're actually on a hillside moving downwards in the way that a vertical game wouldn't, and this is what makes it feel more realistic than Horace Goes Skiing. However, points lost for adherence to restrictions; the heavy "thunk" sound when hitting a tree is something that I doubt the Nokia 3310's speaker could produce, and the howling wind is definitely not something it could :-)
I'm not sure how the game's meant to end? I collected many circles (and missed even more), and just... kept skiing downwards. I even reached the end of the world (or perhaps the edge of the mountain) over on the right. Is there an ending that I missed, or is it intended as something like an endless runner? It would be useful to have some notion of a target to be reached, or a way to end; maybe to collect twenty things, or to accelerate until uncontrollable, or to lose a life every time you hit a tree, or something.