cd /tmp git clone git://github.com/void256/nifty-gui.git cd nifty-gui/ git checkout 1.4 mvn clean install cd nifty-examples-slick2d/ export MAVEN_OPTS=-Djava.library ...

An old 1st (2020) year Paint project in an outdated Java library, Slick2D. It was done using a lot of quick-fixes and exploiting existing bugs. The library Slick2D has been abandoned for many years ...