Game Engine in Java/OpenGL

Need to bugfix/debug java game engine ported from WebGL to LIBGDX. Also need a prototype of OpenGL/JOGL version of the game engine to be developed. The front end is a javaFX application and the whole game engine should work well on all platforms web, mobile and desktop. The game engine code has been ported from webgl to libGDX. But screen is dark. Need to debug. For the prototype, If JavaFX/JOGL is not available, Java/JOGL can be developed. If work satifactory, further work on game engine or other applications can be offered.