How to make something like Simulacra?

Hi,

I'm still fairly new to Unity, but I was wondering what are the easier steps to making a game like simulacra?

 

There's really not going to be any step by step guides for something like that. I recommend, however, a couple simple starting points.

First, you'll want to familiarize yourself with the canvas UI system. The Unity Learn resource is actually very good for this and most of how that game is built is entirely just UI components anyway: https://learn.unity.com/tutorial/ui-components

Since you're new, you'll want to probably post more in the Getting Started forum since it's there you'll find more of the general entry-level advice: https://forum.unity.com/forums/getting-started.82/

 

Ooh I remember Mark's playthrough!

Nothing tooo fancy about the making of this game. Find some assets for modern UIs and get working. There probably won't be many shortcuts as it simply includes so many different apps you'd have to recreate.
One shortcut you can take: Screw it regarding multi-screen-ratio support and just lock the ratio in place. That makes UI design way faster.

Another idea, try something similar: Do it with a desktop system!
A true madman out there has created a full on OS with several applications and it's even currently on sale: https://assetstore.unity.com/packages/tools/gui/dreamos-complete-os-ui-210589
Twisting that into a horror game could be really cool.