John Wilson, of Zenobi Software (a legendary name for homebrew fans on "another" 8-bit system) has recently got back into writing text adventures, at over seventy years of age, producing new games utilising the Adventuron system.
One of his new titles, Ramsbottom Smith & the Quest for the Golden Spheroid, has been converted to run on Amstrad CP/M systems. You can download and read more about the game here: http://8bitag.com/games/ramsbottom.html (http://8bitag.com/games/ramsbottom.html)
It's a twist on the one-room adventure format that John became well known for.
(Some hints... Examine and Search are not the same... and you'll also only get one chance to retrieve some objects)
*edited because I keep putting "Search" instead of "Quest" :)