Continuity mistake: When Shintaro is shot in his leg you see him lying on the football and there is no blood on the ball. Then it cuts for a brief second to another kid, then back and now the ball is suddenly covered in blood. (00:21:20)
Continuity mistake: When all the kids are locked in the cage you see them running towards the cage hitting it. When it cuts they are running towards it and hitting it again. (00:08:45)
