I really enjoyed this so much! Once I got the hang of it it (haha), it was a lot of fun. Kind of like a QWOP for climbing :) Some ideas - sometimes I was struggling to judge wether a hand or foot was actually grabbed onto a rock or not, and on rocks where you needed to grab with two hands it was sometimes not clear which hand would be selected when I click. Maybe some indicators could help to show which part is selected and if they are attached?
Anyways, great job! :)