The Aquarius version is from 1984. The C16/Plus 4 version dates from 1985, according to the inlay.
In later versions of the game control was via normal input or by using a number of pre-defined keys. This allowed the game to run on the Mattel Aquarius.
Jim Gerrie has produced a version of the game for MC-10; available here.
[+] Users who have solved this game
[+] Users currently playing this game
Played on both ZX81 and Aquarius; the latter version differs in some details. The map is slightly different and some objects change (slate/book, flint/match, knife/scythe). Looks like the game was revised at some point, but the changes are not really material.