I have compiled a jar that works on java 11, which can be run with

“java --module-path path/to/javafx/lib --add-modules ALL-MODULE-PATH -jar output/artifacts/comp1206_cw_jar/comp1206-cw.jar”

if you are in the top level of the coursework directory.
The syntax is possibly slightly different depending on the system as I’ve seen some people say they use “—module-path=/path/etc” but it works for me without the space.

Main method is in KonKon.java in case all that doesn’t work. The only non default library it uses is javafx.