From the cover:
The adventure fantasy with the computer game finale.
Includes bonus computer program for your Commodore 64, Apple II, and Radio Shack Color Computers.
From the introduction:
Inside your computer, the land of Venturia is preparing for the birthday of its leader, Romiden. In the capital city of CPU Central, the palace has been beautifully decorated. Huge gold banners line the shiny white walls and green carpets cover the front steps. Multicolored flags wave atop the building in honor of the celebration.