The singleton object AdventureGUI represents a GUI-based version of the Adventure game application. The object serves as a possible entry point for the game app, and can be run to start up a user interface that operates in a separate window. The GUI reads its input from a text field and displays information about the game world in uneditable text areas.

NOTE TO STUDENTS: In this course, you don't need to understand how this object works or can be used, apart from the fact that you can use this file to start the program.