Continuity mistake: When the Man and Woman have lost Alice, they look in the kitchen to find her, and the Woman starts opening up some cabinets and in the process she leaves some of the doors open. Then in the next shot, the cabinet doors that are open have now changed, and some doors that were open in the previous shot are now closed.
Plot hole: The Man goes completely trigger happy shooting all the walls all around his house, trying to kill Fool, Leroy, and Roach at different points. The police come in and don't notice anything wrong. What about the bullet holes all over the place?
Continuity mistake: In one scene where Fool goes back into the house to get Alice, he takes a fire-poker from the fire place. As he walks through the house, you can see the poker is intact. After he strikes "Daddy" you see the poker break. In the next shot, the poker is back, unbroken.
Revealing mistake: When Fool is in the bathroom, the father pokes his head through the door (after firing a rifle at it), and turns to Fool who smashes the toilet tank lid on his head. The blood mark is on the father's right temple, but he was clearly hit in the middle.
Factual error: When the cop (Bobby) asks the woman if it's her van, she says she found it when she got home. In actuality, the police would get suspicious because she didn't report it. Someone comes home and sees someone else's vehicle parked in their driveway and neither her or the man call to report it (at the very least to have it towed)?