Yes, this project uses Minecraft, but it is not the only tool. You will be expected to spend time in at least one other tool and to actually produce games! Also, you must begin with game design concepts.
From Gamestar Mechanic's "Addison Joins the League" quest to Youtube videos code.org activities, this is your intro to Game Design. You will learn:
How to design fun.
The balance of strategy and luck.
Creating flow through increasing challenge.
Did I mention, how to design fun?
Fire up Chrome, Safari, or Firefox, and let's get going! here are the apps you can use to develop great games in the browser.
Arcade from Microsoft MakeCode
Gamefroot https://make.gamefroot.com/
G-Develop Online https://editor.gdevelop-app.com/
There are more on this page.