This was cool! I can tell a lot of thought went into putting this together, the audio is well done.
I think my main complaint is that while I don't have a problem with the speed of the character, the lack of checkpoints hurt a lot when I was near the top and thought I saw a secret platform to grab, and fell to my death. Suddenly that thematic slow climb up the mountain because very tedious.
I know this may not be a popular opinion, but I gave 4 stars on art.
The reason is because the use of the headlight is underrated and the snow effect is INCREDIBLE. I wanted to do something like that for my game but didn't have enough time.
Great work!