This is a graphic adventure set in darkest Africa. You take the part of Dr. Livingstone in his quest for the long lost Kenyan Diamond. He is helped by a monkey. You can choose a strong, stupid monkey or a weak, clever one. Once you've made your choice, you're stuck with him, though, if you stray too far away, you may lose him.
The locations scroll in an east/west direction, and you can move this way under joystick control. To move north or south, or to do anything else, you type in the relevant two word command. When moving east/west you have to type in "LOOK" to get a description of your surroundings, as the description is not updated unless you do this and not all of the objects are readily identifiable.
According to the instructions, an experienced adventurer should be able to complete this game in fourteen days. I didn't complete it so I can't really comment on this. There is a helpsheet available if you get stuck. I think I'll send off for it now!