server is written in PHP listening on udp, for client you can use modern web browser with websocket-udp bridge (provided in repo), or use nodejs (electron), I also provide prebuild binaries for some systems on itch https://solcloud.itch.io/counter-strike-football#download

Yep.

Server UDP:

https://github.com/solcloud/Counter-Strike/blob/7dab1533ec4d...

Client Websocket:

https://github.com/solcloud/Counter-Strike/blob/7dab1533ec4d...

*unfazed