Yes, the wall jump is depending on pressing against the wall, just like pressing your hands against to wall to get a grip.
How would you have liked the wall jump to behave?
No, it was not intended that you can possess through obstacles, I just didn't think about it. I'm glad you're giving me that feedback so I can fix it :)
I'm very glad you like our concept, that makes me very happy. Thank you very much for your feedback :)