There was an early scene where the Backrooms character had to kneel down and crawl into a small knee-high opening leading into another room.
There were multiple scenes where a "grinning sun" wall figure is shown. There were some scenes where the rooms expand "into the wall" in a rotated way. And the perfect cubic cutouts of the floor and ceiling that occasionally lead to another room.
These were all the major things from what I can recall and almost feel like direct "ripoffs" from Ocarina of Time. I felt they were well done and have no intent of trashing the movie. While watching it just felt the director was probably a big Zelda fan.
Curious if anyone has thoughts here or if these are just coincidental stylistic choices.