Hi WesleyJB!

Actually, the server is written in C++.
As cuddlebunny said, monkeybrown has no jetpack, so you can change his checksums to other worlds.
Try these instructions for setting up 0.6: https://github.com/jaller200/LUNIServerProject/wiki/How-to-set-up-your-LUNI-server-0.6

After you finished setup and created a character, you can even edit his outfit before going into the game easy.
Hope this helps!

As long as you hope, you can.
XYQuadrat