Hello Altobi,
You want to run Nuggeta on your own server? I know that it should be possible and I thought I saw java mentioned in combination with running a local server. Don't know how to download the Nuggeta Server or how to run it.
The reason I went for Nuggeta is because it was cloud based and we got the information that their servers are free to use for indie game developers with light connections.
Since then they modified their engine a couple times and the news that they will stop running the nuggeta servers in the cloud made me to abandon this.
I'm making multiplayer extension to work with a LAMP server (Linux Apache MySQL PHP)
But it is far from finished and I can't promise anything, but the leaderboard should be finished before the end of the year.
After the leaderboard I will be doing a Lobby Server. After that I will be doing an Inventory/Property system.
If you know how to program a server then it is fairly easy to connect to it using Stencyl and the visit URL blocks.
Best regards from
M.E.