Funhouse, Williams, 1990. This game is so evil I wrote a short story about it.
The conceit is a funhouse at a carnival. There’s a hot dog cart and a mirror maze and a trap door, but the primary feature is a giant ventriloquist dummy head named Rudy that talks to you throughout the game.
He’s creepy normally especially if you’ve watched the ventriloquist episode of Twilight Zone, but at one location I play at his eye is upside-down and he goes from creepy to cursed.
The backglass is… a thing. Rudy as a giant head with giant hands nearby holding doorways into the funhouse looks like he’s sitting on the stage of a 1940s dance stage. A large crowd is in the foreground surrounding the stage. Some scary posters are to the left. Beyond the first horizon in both directions are circus tents, balloons, etc.
The building behind the creepy head has lots of people riding slides around building edges as if the funhouse was also a water floom.
In the right foreground, Rudy stands with a very large clock slung around him, and the sign for a ticket booth declares that the funhouse closes at 12 (an integral part of the game play).