• Original: http://www.goodboydigital.com/pixijs/examples/11/
• Original source: view-source:http://www.goodboydigital.com/pixijs/examples/11/
• Kotlin source: js/app/main.kt.txt
• Kotlin source compiled to JS: js/app/app.js

Some minor differences are due to the version of Pixi.js used in the original demo and here. You can track any progress on this in issue pixi.js/1005