It would help if we knew exactly which year you started. The earliest “castle with countless rooms” that I remember was “Castle Adventure”. ASCII characters were used for enemies, items, and walls.
I’d think that if she were talking about Leisure Suit Larry then the description would be… a bit… more descriptive! I don’t remember keys per se unless you mean items. And wouldn’t be PG - don’t remember many kids movies using condoms or blow up dolls.