This web server is Apache Tomcat 9.0 running on Raspberry Pi 4B hardware. The OS is Raspbian 10, based on Debian Linux.
The games hosted on this web server were written to learn and play with Javascript, HTML, and Java on the server side. They are only intended to be run on a Windows laptop with a large screen, a mouse for pointing, and a Chrome browser. I have not spent time to adapt them to Apple devices, small screens, or touch screens. They may have limitations in those non-laptop environments.