void FixedUpdate ()
{

    transform.Translate(Vector3.up * currentSpeed * Time.deltaTime);
    float newManeuver = Mathf.MoveTowards (rb.velocity.x, targetManeuver, Time.deltaTime * smoothing);
    rb.velocity = new Vector3 (newManeuver, 0.0f, currentSpeed);
    rb.position = new Vector3
    (
        Mathf.Clamp (rb.position.x, -1.88f, 2.5f), -----> -1.88 is the x value where the ball is supposed to stop, and its in fact stopping there, but this value changes, i suppose, depending on the resolution

    Mathf.Clamp (rb.position.y, -8f, 7f),
        0.0f
    );
}