Yeet demon floor clip: By holding right while being thrown by the rightmost yeet demon in R.4 (the room with the kitchen key), you can clip into the floor above you, then spam jump and keep holding right to clip back out on top of the floor.
Double main menu: While in the game, exit to main menu and immediately press pause. You will have a copy of the pause menu (that only closes when used) superimposed on the main menu (where the main menu text is invisible, interactable, and does nothing when clicked). To see and interact the main menu text, press restart before anything else. There is no known way to get this into the levels.
Dialogue movement lock: If you interrupt dialogue by restarting or exiting to main menu, you will not be able to control the character until either restarting the game or pressing New Game and finishing the initial dialogue.
Cerebus clip: If you are airbourne when a cerebus begins the kill action, you will fall through the floor.
Button activated platform floor clip: If a button activated platform pushes you into the ground, you can clip in if it can't find a way to snap you out of the block