Just now noticed your twitch link, solid effort!
I agree with the feedback. I'm not entirely sure what we will end up doing for running/sprinting, but I don't want to require the player to hold down the button 100% of the time, naturally.
The green stuff up on that cliff wall is to add a rope to a harpoon, and if you turn around, there's a blue box at the other side of the cliff you can tether to. However, it's clear to me that this one is a bit hard to catch. I'll improve the environmental guiding.
You did seem to have a hard time with the jumps. Did they just feel a bit strange, are you able to pinpoint what exactly was causing you grief? Just too precise jumps in general?
Thank you for the effort!