spent like 30 minutes immersed in all the Molyneux going around today and caught wind of his very first, failed game from 1984, The Entrepreneur for BBC Micro. claims only two copies ever sold.
this was the ad he took out to promote it in the May 1984 issue of Acorn User (scan is from stardot.org.uk forums). i guess he was always...himself, huh. or already was by then.
the stardot forums say the game remains lost. it seems pretty easy to get in touch with Molyneux, so if one wanted to preserve it, asking him directly if he has a backup would be a low lift.