Very impressive game! I think the way you implemented the climbing was super cool also bonus points for implementing the the theme in multiple ways. I really liked how you introduced some puzzle elements as the climb came closer to its conclusion. I am sorry I do not have much in the name of feedback on this front (i may come back later with more as I think about it.)
Visually the game looked great, and I am really impressed how much information you were able to convey with so little fidelity. I was equally impressed with the sound design. Really well done