Ive created a few games using the GAMEMAKER Z-TILT routine,

and as much as its well documented here ->  https://www.yoyogames.com/en/blog/z-tilting-shader-based-2-dot-5d-depth-sorting  --

I still frequently get asked how I do it, So here is my 'simple' PACMAN clone,..

INCLUDING:        * FOR GAMEMAKER 2.3 ONLY.!! *

- Z-TILTING Routine,. (CREDIT TO “Ariak” )

- Great PATHFINDING Routine,.