I just went in and tried to launch the jar file manually (java -jar game/desktop-1.0.jar) and the game fired right up just fine. So this seems to just be a problem with the windows exe packaging. The included JRE does not jive for some reason.
It all depends on which system you are using to generate your windows executable. I’ve used launch4j in the past and was able to generate OSX dmgs and windows executables from that with all of the native binaries, class files, and dependent jar files properly packaged in but it took a LOT of work to get it all configured right and that part always felt rather delicate.
Seth B.