It's about as IFR as you can get. It's been a long time since I flew it but I still recall it was a rather strange experience. You followed yourself on a grid, and controlled your position by taking different headings. The idea was to fly at different altitudes, slip through narrow openings, make 90 degree turns to snake your way through, and land at different "airports" (which were just locations on the grid) by landing completely blind, with descent rate at touchdown determining whether it was a landing or a crash."
MiGMan thanks Ed Brooks for the synopsis and scans.
IFR (Flight Simulator) for the Commodore 64 by Ron Wanttaja, published by Academy Software of San Rafael, California, copyright 1983.
Look at the map