Continuity mistake: As the wall without end is first shown, the camera pans across to show Link and Spryte walking/flying along it. The top of the wall is a layer of blue bricks with lines between each one showing the division. But then it cuts to a close up of the duo and shows the wall closer, the top part is now suddenly one solid piece. In all following shots, the wall top is once again made of a layer of blue bricks.
Picture added by Quantom X