Continuity mistake: When Goofy throws his horseshoe at Bradley near the end of the film, it hits him in the neck. But later when you see Bradley, he has a black eye even though the horseshoe never hit him in the eye.
Continuity mistake: The jersey on the chimp goes back and forth between Ribchimpsky (the injured player) and Jack. The numbers on the jersey change as well.
Continuity mistake: When Mrs. Lopez calls Allie out as she is working on her illuminated manuscript, the object of her attention drops the pen before turning around. In the next shot he's holding the same pen in hand. (00:04:55)