I played this game on the C64 when it was released in the 1980s, and never managed to finish it. I managed to figure out what I needed to do to proceed, however I never managed to find the missing piece of inventory (I don't want to leave spoilers)
It was fairly clunky even back then, picky and annoying, but still... I often think about it, and I often wonder if I might manage to one day get it in an emulator of some kind and complete it, 30 years later...