Well, CvRL doesn't use an emulated terminal display but is tile based instead (when you run it by doubleclicking the jar file, that's it).
Did you delete libjcurses.dll on the .\lib folder?
Can you chmod the .sh files and run it from there instead of using the jar file? (or just access the terminal and run "java -jar metroidrl.jar"), so that we can see the error message
Anyone else having problems running it on mac?