Throughout the Friday the 13th franchise (except for the first one, of course, since it was mom doing the killing in that one), Jason Voorhees has always been an innovative and resourceful murderer. A prime example of that is this scene from Friday the 13th Part VII: The New Blood, in which Jason uses the sleeping bag that Judy seemed to think would keep her safe from him if she just tucked her head inside of, as a tool to pummel her against a tree. A little more can be learned about Judy at the Friday the 13th Wikia.
As for the actress playing Judy, Debora Kessler, her acting career was apparently just as short-lived as her character in this film. According to her IMDb page, she didn't have a single credit before or hasn't had a single credit since this film. She now resides in the "Whatever Happened to..?" file.