Thanks
So, in that case, I guess if I made my game using this library it'll be a system-dependant (Windows) application. Isn't it?
Nope it should be platform independent but the OpenGL mode in there is indeed for windows only because of the LWJGL for linux and mac os is not distributed in there.
Actually I'm not the developer of that game, I'm the developer of game engine that made that game.
That game is created using Golden T Game Engine (GTGE) I made, GTGE by default is using Java2D (this is platform independent) and can easily port to OpenGL via LWJGL or JOGL by changing only a few lines.
LWJGL is supported on Windows, Linux, and Mac OS so it can be said platform independent, but in that game the LWJGL distribution for Linux and Mac OS is not packed, so at the moment the game only can be played on Windows.
The prove that it's platform independent, just try out the applet in Linux and Mac OS.
Or you could see other OpenGL game in my site that distribute all necessary package for other OS
(but unfortunately the site where the games are hosted on is down right now):
http://www.games.goldenstudios.or.id/