It is recomended to use Intellij IDEA (JetBrains)
You can run the program by downloading the server.jar file and using the following instruction:
java -jar server.jar
By using the option --view as shown below, file view.html will be created to help observing the game:
java -jar server.jar --view
By using the option --extra as shown below, you can increase the timeout:
java -jar server.jar --extra=200 or java -jar server.jar --extra:200