oookay so here's an issue for me.
the climbing system doesn't work on my computer. i got stuck and couldn't get past the first tunnel because i couldn't climb the terrain unless it was tall enough for the character to do the reach over her head animation.
any ledge that was shorter than that and the whole thing failed to get the character anywhere. I only got as far as inside the tunnel by cheesing running jumps to get over the ledges...
i use a mac laptop by the way.
Thanks for the report. This can happen if the framerate is low - the climbing system times out before reaching the top of the ledge. We're working on a fix. In the meantime, have you tried running the game at something lower than 1080p, or switching to low quality in the pause menu?
i have, and it hasn't seemed to help much at all. though in all fairness my computer is fairly old so this sort of things unfortunately happens a lot.