Hey, that's pretty cool. It's a bit difficult though, because i'm dying all the time and aiming with arrows or magic is difficult too. Maybe a kind of (semi-) auto-aiming would help a lot in this regard.
When using the software renderer, you may want to have a look at the MipMapper-class that can be found in the download section to reduce texture aliasing (at the cost of some performance of course, but usually not much if even noticable).
About the "JOGL-calls" at JavaGaming.org: jPCT can render hardware accelerated (using LWJGL, not JOGL...but who cares...) into an applet too when using the AWTGLCanvas, but i don't think that it's worth the trouble. Software for the applet and hardware for a webstart version sounds more reasonable to me.