How to make a character walk up walls?

Hey I need a character to walk up walls like knuckles from the sonic games

I've been able to make the character move up and down with the 8-Directional conrol but the chracter clips through the wall.

Thanks

Platformer + 4 direction:

drive.google.com/open

That is exactly what I need thanks!!!

But, the link does not seem to work

That is exactly what I need thanks!!!

But, the link does not seem to work

I fix it.

Thank you!