My browser / operating system: Windows 7, Chrome 86.0.4240.193, No Flash version detected

I'm making a sprite based 3D game, and I have to stop the player from moving through walls. So, My idea:

move

move ((() - (inputted)) steps)
 

But I can go through the walls and when I am in the wall and click <touching [Wall] ?> It says false!

Link: https://scratch.mit.edu/projects/444008438/editor/