Great job! There's a nugget of a full-scale game here I think. The concept of climbing with your dog has some serious story-driven game potential. Thinking 'The Flame in the Flood'.
I think most of the faults of the game are really just born from the time constraints you faced. I did like the eventuality of my emotional and physical strain, but I didn't feel like any of the choices were ambiguous. The 'correct' path was always clear. I think with a little more balancing this game could be very very sticky, like 'Slay the Spire'.
There's obviously artistic talent on the team so I'd really love to see more of the main character, and dog. Animating characters in such a short amount of time is difficult though, so I gave 5 stars to the art that IS present.
I really hope you keep developing this game. I'm a fan of what you've done so far!
Adam