There is not a TLB, cache, ring modes or a MMU, so IMO is pretty far more simple.
Trillek is open source game inspired on Notch's 0x10c . So the idea of the game is have a open world space game were you have a computer were you can do anything with it.
As for Trillek I see that now. However if you looked at the project page alone without these references, it's very off-putting by the lack of a concrete plan and the abuse of flamboyant language.
One could go the ARM or MIPS route and these machines actually exist.
BTW what is this Trillek thing?? I was browsing a bit and I can't quite figure out what's the point.