Thanks. Around 1-4 days (first public version). I used AI, Toolbox (Models and some scripts) and a little knowledge of Lua programming.
It seemed that there were not so many scripts in this game, since everything here can be done as simply as possible, but in fact, the opposite is true. For example, the script responsible for the elevator doors must manually enter each model that will appear in the workspace.
Simply put, for professional programmers, you can write a game in a couple of scripts, and in my case, a ton of scripts.