Uh, hi, so I'm 4thguy. My last visit to this forum was 10+ years ago 🤯
Judging from the cut-off date, school got intense during those last two years, but at least I have a degree?
To run the jar file you need to install a Java Runtime Environment. This will allow you to the jar file as an executable for your computer.
You can download it from here http://www.java.com/en/download/manual.jsp?locale=en
(Don't extract the jar file, it won't work)
The advantage of jar files is that if you can run the program on any platform that supports the Java Runtime Environment. With executable files, you need to recompile each file for each platform that you want to run it under.
It would be hilarious, too. Ten years of not selling a decent adventure game and they decide on a whim that it's time to revive a lost art.
Hey, they would have gotten the game for free*
stolen it