У вашего броузера проблема в совместимости с HTML5
Update - JavaPackager is now defunct. Use JPackage. I wrote a tutorial here: https://github.com/raeleus/skin-composer/wiki/libGDX-and-JPackage
This tutorial will show you how to integrate Java Packager with your LibGDX game or app. Using Gradle commands to package and minimize the JRE makes distribution most efficient.
Source Code: https://github.com/raeleus/JavaPackager-Video
How to set JAVA_HOME: https://docs.oracle.com/cd/E19182-01/821-0917/inst_jdk_javahome_t/index.html
Native JDK9 App Bundles:
https://www.youtube.com/watch?v=2fWyhJ2nhjw
Java Classes and associated modules: https://docs.oracle.com/javase/9/docs/api/allclasses-frame.html
Create ICO and ICNS icon files:
http://icoconvert.com/
https://offdrive.com/convert/png/icns