it's a very nice entry congrat's! I like the story and the variety of levels. It will make a very cool game if you add all the other levels.
The visuals are really great. I also acknowledge that you added checkpoints (it' really a game changer).
On the bad side the controls were sometimes awkward and the camera just fixed itself in the village. Some explanation of the different yeti capacities would be great and it would also be good to add a quit level option. The music although very nice and easy listening seems a bit out of place.
But all in all very solid entry!