In the Arcade scene later in the film, various types of typical coin operated games are shown. One quick shot shows an unknown game with a Dinosaur that makes a certain sound effect before cutting away to the next shot. This sound effect is that of one of the various creatures in the 1993 Video Game "DOOM". Most notably the "Pinky Demons".
The trivia item below may give away important plot points.
During the films ending, the Clown's "skin" dissolves and melts off Kent. The style and camera angles are very reminiscent of the ending of The Evil Dead (1981) in which a similar process happens with the possessed when they eventually killed, an obvious nod to possession of the body etc.