Nice premise! I like that you transition between the different zones seamlessly, it makes the world feel real. There is also something satisfying about having the yaks and fuel be tangible objects you carry around manually, helps with immersion. Have you tried a first person or over-the-shoulder camera? I'd be curious what that would feel like.
I think the controls can be improved, both for movement and interacting with objects, it's a bit finicky at the moment.
I like the idea of having an AI to keep you company, but I didn't enjoy this one. It felt like a human to me that is also kind of a dick.
But overall some great initial stuff here, keep at it!