It was one of the first commercial software programs written for the ZX81, and something of a runaway success, selling a massive 90,000 copies, earning Singleton £6,000 for his efforts,[4] having taken him just two weeks over the Christmas holidays to complete.

The game was so popular among the readers that the editor asked for conversions for the Commodore 64 and BBC Micro to be produced, and each of them featured in C&VG's 1985 yearbook.

Had Eye of the Moon come to fruition, it was to have had around 24,000 locations, in a map featuring twelve distinct regions, each with a local sub-quest completely separate from the main objective of the game.

In the 21st century, Singleton continued working in games design, making him one of a few developers to have made the transition to more modern consoles from the early days of home computing.

He was a fan of the television program Doctor Who and appreciated music from rock bands such as Pink Floyd, Deep Purple, and Led Zeppelin.

In the interview, Singleton expressed his ambition to create a timeless classic game, comparable to chess in its enduring appeal.