Continuity mistake: When Danny is playing alone in the corridor, with his toy cars and trucks, in the overhead shot, the little vehicles are set up on the orange and brown pattern, as the ball roles to him down the center brown path in the carpet's sextagon pattern. However, in Danny's close-up, when the ball is in front of him, all the little toy vehicles are now set up (still the same way) on the opposite side of the carpet's distinct pattern, as he also faces the opposite way. This mistake has absolutely nothing to do with the ghosts of The Overlook moving the ball.
Continuity mistake: When Hallorann is showing Wendy & Danny around after they first arrive at the hotel, they walk through the kitchen towards the camera & into the freezer door to the left of the screen. You can see the kitchen still visible in the background. When they leave the freezer (after Hallorann calls Danny "Doc"), the background is completely different & the kitchen is not visible. This is because they have actually filmed a different door on the opposite side of the corridor. They then walk towards camera again & back into the kitchen they have just walked through.
Other mistake: When Stuart Ullman is showing Jack and Wendy their quarters, there is a window on the wall to the right across from the bed. However later, when Jack tries to break into the bathroom with the axe and Wendy puts Danny through the window onto the hill of snow, their quarters is not on a corner of the hotel, which the aforementioned window would suggest. (00:22:45)