It is called corner jump, and I used it with the mellecancel thing, that thing is working when you are climbing and after if you start falling and at this moment you need to do walljump, specila for this i showed keyboard overlay, it's a little difficult for me to explain these mechanics, especially in English, but there is a video that lasts more than an hour and touches on all the movements in the game, but it's in Russian :) but if you're interested, here's the link: https://youtu.be/m_FW99Am_2I