I had to sand the colored pieces.
Infill: 20% worked for me. If you want them to be more heavy, you can increase the infill.
A friend has the original game and said my pieces were more stable.
I made an Android app. If you're interested in that, let me know.
I also included a box in the design that can fit pieces for 6
The author remixed this model.
I made smaller pieces, but it works great.