He was a pleasure to work with and it seemed he made a decent living just off of support contracts for projects like this. One of the few one-man-shops that really, really worked out.
The same project (nTAG Interactive LLC) also involved Brian Silverman who famously made a Babbage style mechanical computer capable of playing tick tac toe using only tinker toys for construction while he was still attending university. He also created the original Lego "computing brick" which ran Logo, a lisp-adjacent language, via interpreter/pcode vm he wrote using HC11 ASM (and later he ported to PIC for the "Cricket" robotics controller.) That brick project spun off into what is today Lego Mindstorms. So I've had the privilege of working with some very creative and intelligent folks over the years.
I had only stumbled into the opportunity by way of working as an assistant at my local university's robotics lab (to help pay for undergrad) when my professor thought I would be a good fit for the MIT Media Lab startup opening.
The job was a tremendously fun time and to this day I still think of it as my "favorite" work experience. Sadly, as with most startups, ours didn't make it when funding dried up, so the fun eventually ended. To be honest, I've been involved with a number of other early stage startups (and various larger size orgs) since and none have come close to the experience. There truly isn't anything better than being surrounded by folks who are masters at their craft and are willing to help you learn.
I am interested in a thing where the whole programming language / program stack and everything is stored in the memory so you can have a language where it can run from where it was paused , inspired by some comment on some other hackernews thread . I had spent some of my weekends trying it but no use