Before I go on a rant about the little things I didnt like: This game is awesome! I especially love the little atmospheric storytelling in between, well done!
So my only real problem with the game were in the controls, here are some remarks/suggestions:
* If you stand on an edge and pull someone up, its possible that they get stuck and both characters cant move anymore.
* If your partner has 0 stamina left and you're holding them, then it can happen that you're forced to slowly pull and release the rope until you also have 0 stamina and fall down, a button to purposefully drop would have helped there.
* If you are hold in the air by your partner, it would have really helped the flow of the game if you could swing yourself sideways.
* If you climb a tiny bit too high, you lose grip and fall down even when it still looks like it should be fine, the collision detection could be a bit more lenient there I feel like.
So essentially, the game is so slow that if you fall down and it doesnt feel like its your fault, then it really feels bad. Anything to speed up the downtime after failing or making it feel less unfair that you have to reset would help there.
Also just an idea, would it be fun if you could control both simultaneously, one with WASD and one with the arrows?
Oof, that got out of hand, well anyway, awesome game! My favourite so far!