Hi guys, enjoying reading through your posts. I had an Atari 800XL growing up and my fave games were Jungle Hunt, Dig Dug, Donkey Kong, Pengo & Java Jim. I remember lending a game from a friend whoich I really enjoyed but alas I can't remember the name to save my life. Basically you are a ghost and are in a house and have to solve these little puzzles in each room. The longer you stay in a room, the greyer you get. If you turn black then you die.
If that rings any bells, then please let me know the title. It's been driving me mad the last 10 years