I wrote a clone of this game for the HP-48 as a teen in the 90s. you can still find it if you google hard enough. good times.

I still have my GX from the late 90s which managed to outlast my Metakernel equipped, overly rubberized 49G. If I were to dig it out, the serial cable too.

And a printout of the sysrpl guide, it being quite thick of a print.