I've been looking at his notebooks (what I can see of them at least) and it seems to me like he was planning on making an Android Game that would use the Screeps servers as a back end using the Screeps APIs. Seems like he was going to have players BUY "Nanites", which seems to be a predefined set of custom designed and coded screeps. (If you notice the page that lists different types of Screeps is very similar to the types of Nanites he was going to be selling his players on the other page.)
It's a very interesting Idea but I highly doubt the devs would have allowed it (at least not without getting "a piece of the action.")
It also seems like he was intending to mine cryptos on the Screeps servers with extra CPU time.
All this (along with his nutrition bars ideas) seems to me like he was financially desperate and looking for ways to make a bunch of money, fast.
Q: Was this guy Homeless?
Q: Any further info on the possible "Wasting Disease" the hiker had?
Just my interpretation of the Notebooks, please keep us updated!!!