I played this around 1988 (it could be as late as 1991, but that's unlikely) or so at my Uncle's house in California. I remember Autoduel also being on the machine. I think it was an IBM PC. I've tried asking my uncle about it, and he doesn't really remember.
I remember the beginning had a page of text explaining why you were playing. I think that it was your standard fantasy setup with the evil wizard in a tower. The opening was an action sequence where you were trying to navigate your raft from the top of the screen to the shore at the bottom using the arrow keys, avoiding hazards on either side of the channel. I don't remember if this was something possible to win or lose. It was in a fairly primitive line-drawing setup, I think.
After that, I remember it as being an Interactive Fiction kind of setup with typing in commands (GET MAGNIFYING GLASS, GO EAST, etc) with drawings at the top of the screen (draw in place with lines, I think, largely dark and few colors if not black-and-white). One of the items was a magnifying glass, which I think was used to ignite some brush. I mainly remember the magnifying glass because there was a scene where, if you entered a village, you joined in their festival and succumbed to food poisoning after which they carried you to the outskirts and left you there, with someone pilfering the magnifying glass from you. I have a fairly vivid memory of that screen, up at the top of a hill with trees to one side, and the village down at the bottom of the slope.
I don't think that we beat the game in the week we were visiting, and it's been a number of years, so that's about all I remember from the plot.