The video game Garrett is playing when the ladies show up at his apartment is Castlevania.
Ellie's roommate Hannah (played by Amanda Lund) is seen wearing a Pistol Shrimps basketball jersey, with "Lund" on the back. Amanda Lund is a member of the Pistol Shrimps basketball team immortalized in the documentary The Pistol Shrimps (2016).
Stuart Gordon (1947 - 2020) is listed in the credits under "Special Thanks." Gordon co-wrote and directed Re-Animator (1985) which this movie is heavily influenced by.