Sounds good! I wouldn't necessarily endorse launch4j (especially considering how simple the libgdx packr seems to be). It was a bear to get setup right but once it was and I had my Ant script properly configured I found it to be very easy to maintain and update, FWIW.
My 9yo son discovered MewnBase through watching let's plays on YouTube and boy does he love it! He has all kinds of ideas for new features ;-)