I've let this game page sit fallow for far too long a time, so today I went out and actually did what I promised over a month ago(!) and submitted a download with the source code. I've tried to do a good job of annotating it so that it's clear for newcomers to Twine to read. Note that you will need to use Twine version 1.4 or greater to open the .tws file; you can download Twine at
Twinery.org.