For those of you who are trying to find the hidden signpost in MOM's Computer, I made a (cheating!) video showing where exactly the signpost is. After several tests of the level, I calculated that it takes about... 14 or 15 of the "Games" blocks to make it up to that signpost.

Alright, here's the link: https://mega.nz/file/YNg0gZKZ#jo4RY5g2NDVq0rGWxItSrCd2t0KaVtrILQ9h1IojOro

It's very cool, and I still can't get to it in the normal level!!!

-the Sign Painter