InterLisp Fifteen Puzzle

This is an attempt to write a small game in InterLisp.
It's a personal challenge.
I don't know the GUI system.
I don't know the OS.
I don't know the InterLisp dialect.

You can download the Xerox PARC Medley Lisp machine here.

The lisp.virtualmem file should be a snapshot of the memory.
@screwtape suggested this method:

./medley/medley/run-medley --vm-file lisp.virtualmem

On my Linux machine it goes in ~/il/vmem/

You can then start it from terminal by simply typing medley .

Once InterLisp is running, you can right click the desktop and select InterLisp.
Then in the REPL type (START-FIFTEEN 4 4) and hit enter. (you need to type all caps)
To view a list of functions for the jam type (FILES?).
To edit/view them type (ED '<name of function to view>)