This is a question about the blurring of the drawing when moving the character of unity5.

Hello
When I try to make a 2D game with sprite while using unity 5.2, the simple movement is sometimes unstable (shaking every 3 seconds).
The bigger the character on the screen, the more noticeable it appears, and when you attach the camera to the character, the character does not shake, but the background shakes.

void Update(){
    transform.Translate (Vector2.right*movex*Time.deltaTime);
}

The simple cord like the one above has a blur, but do the people who make the action game make it work smoothly with complementary or something to do when they move?
I think the 2D action in the unity sample is also blurred when moving simply.

Thank you for your cooperation.