Hi Karen! I am the CMU professor who pitched and advised the project, so I'm happy to answer your questions about it. The team members have all graduated from our Masters' program now, so I don't know if they are still following this page.
Unfortunately, only limited excerpts from the newly discovered Liubo bamboo texts have been released so far. Reportedly, the tomb of the Marquis of Haihun (Haihun Hou) -- who was the Han Emperor for a few dozen days, before being deposed -- contains extensive texts on Liubo, but they were misidentified at first (as being about something else) and have not yet been published. So the team did a bunch of research about the new texts, as well as other texts, but ultimately was not able to make as full use of them as we hoped.
If you're interested in their process of recreating the game, they discuss it in this presentation they gave for Generation Analog (an annual online conference run by the journal Analog Game Studies):
https://youtu.be/tuTYT8r6KoA?feature=shared&t=1099