Shoould we be looking further into the name behind Millies work??
Shadowgate
"Shadowgate is a black-and-white 1987 point-and-click adventure video game originally for the Apple Macintosh in the MacVenture series. The game is named for its setting, Castle Shadowgate, residence of the evil Warlock Lord. The player, as the "last of a great line of hero-kings" is charged with the task of saving the world by defeating the Warlock Lord, who is attempting to summon up the demon Behemoth out of Hell. Later that year, a color version of the game was released for the Amiga and Atari ST, and in 1989 for the Nintendo Entertainment System."
https://en.wikipedia.org/wiki/Shadowgate