The original Horace game, Hungry Horace was written as a simple Pacman clone, published in 1982. In it, Horace must gather food from around a park and move onto the next section while avoiding park guards. It is possible for him to collect a bell to panic the guards and render them vulnerable, like the power pills in Pacman. This title was available on the ZX Spectrum, Commodore 64 and Dragon 32. The ZX Spectrum original was marketed and distributed by Sinclair themselves, the Commodore 64 and Dragon 32 versions by Melbourne House.
The Commodore 64 version also included a level editor which allowed the game owner to create, edit and save to cassette tape their own levels of the game. These could be shared with other owners of the game.
Source: Wikipedia, "http://en.wikipedia.org/wiki/Hungry_Horace#Hungry_Horace," available under the CC-BY-SA License.