I've watched the video in the page, but unclear what's the advantage of making it a language / environment vs. using Phaser.js The code structure feels quite s

I've watched the video in the page, but unclear what's the advantage of making it a language / environment vs. using Phaser.js The code structure feels quite similar with setup / step -> create / update. eg: https://labs.phaser.io/view.html?src=src\physics\arcade\500%20colliding%20bodies.js https://labs.phaser.io/view.html?src=src\physics\arcade\500%... -> [source]