How quickly can one make a decent looking RPG engine? I dunno.. let's make this one fast instead :D I sprayed some dots on a solid color then erased the halls and rooms. Add some layered pen stamping, brightness adjustment, and color cycling and you're there.
this is an old technique of using pen stamping to fake 3D, no telling who came up with it? I used it recently to make this car https://scratch.mit.edu/projects/639642515/