When Will is training Twoee in the garage, his sister comes up on a scooter with two hair braids out of her jacket. When she talks to Twoee, one braid is in her jacket.
When Twoie is first created, he is supposed to be naked. When he goes over to the counter to pick up the powder, you can see that he is wearing something around his waist.
When Twoie dances in the cafeteria, a school boy says "All right" and turns on his boom box. But he never pressed a single button and the song starts up.
When the cloned mouse escapes the cage at the beginning of the film, a human hand can clearly be seen on the right side of the screen holding something to attract the mouse to move toward it.