Well I tried clearing the LWJGL cache (I actually didn’t know you could do this before, but I’m glad I know now) but that didn’t work, it still has the same problem.
So… going along that line of thought, I went into my Java/bin and Java/lib/ext folders… and sure enough there were a set of files with a “lwjgl” prefix. Now, I never added these there, and I don’t really know how they got there. Unless I did it unconciously. More likely someone’s program did it without me knowing.
Regardless, deleted the files and now it works 
Btw to give some feedback, the game runs great even on my old 850 mhz computer with the TNT2. Very playable. Had some good fun playing through the first 7 levels or so I think.
Anywho, it was my fault, but thanks for fixing it anyway. Keep up the good work. 