Overall, this is super cool! I think there are a few things that need clarity, but I can tell that you have a solid direction, and will get that clarity before too much longer. In my opinion, some of the things that are unclear is what is a cliff up/down if you're moving left/right (the whirlpool area is much more clear on this, but some of the walls in the plains felt like I could jump down when I couldn't) and the other thing is what a campfire is. I'm not sure if there just weren't very many, or if they blended into the background so much that I didn't see them. I was trying to look for one during the polar bear fight, but I didn't see any. I think maybe a cool addition would be to be able to build a campfire with driftwood you collect, since the campfire seems to be a crucial part of combat. 

Can't wait to see this updated!