I just bought the virtual pack and am running a few test prints. This reminds me of a much more elegant version of a toy I had in the late 60s which was also a marble driven computer with toggles. (Not Dr Nim)
Overall it looks like a home-made board is going to be the biggest struggle, but I have a few ideas that I want to percolate before I made dumb suggestions.
I think this is going to be fun.