I had found the link to a great site, Order in the Library v4.0, to have my students practice sorting, organizing and re-shelving books by Dewey Decimal and alphabetically all of January and February...and now I'm getting a message that I'm "not an authorized user from this server"?

It was great for the students to practice their library skills and for me to use as an assessment tool!! Does anyone have access to this site anymore?? It was a UTexas game created by college students for one of their classes...great job, too...my students loved it.
If anyone knows/has information on how I can get access to this site and would like to share with me, I would be extremely grateful. I had planned on using this site as part of my Student Learning Objective for my evaluation, but...
Thanks in advance!!