How do you make the player wallrun/wallclimb, Im making a Game kind of like the indie game pizza tower but I’m not sure now to make the platformer character run up walls without jumping/falling off them.
Welcome! Unfortunately, this is really tricky. the way the platformer behavior works, flipping gravity is just not possible. you could apply an instant force of 360 degrees or 180 but then you have to face the problem of getting the controls to work. I’ll do some research on this, but from what I know the only way to do this is by using the physics behavior or making your own platformer behavior from scratch.
I will notify you of any way if find to do this.
happy creating 
Personally, I would install the walljump/wallslide extension and check for whenever the character is wallsliding, then subtract a number of your liking from the position of the character. If you want them to only climb them to climb the wall when off of the ground, just add the condition “[character] is on floor” then invert it. Hope this helps! P.S. You don’t need any additional code for slopes. The character automatically climbs when running from a slope and onto a wall. : P