Hey, I just gave it a try, and I think it’s pretty good.
I did have some issues with jumping, mostly when already moving sideways. Total guess, but perhaps the keypresses are clashing.
I noticed that jumping when moving down a slope is not really possible, and I think that’s because the snowman is not directly on the ground.
I might be wrong, but that’s how it seemed to me, hopefully it lines up with what you experienced.