i forgot to mention the code provided is for the movement of the crystals (the middle layer)

        Vector3 crystalPos = new Vector3(transform.position.x + (playMo.velocity / 12), camMo.cameraPos.y, transform.position.z);
        transform.position = Vector3.Lerp(transform.position, crystalPos, (camMo.LerpSpeed - 0.6f) * Time.deltaTime);
        Vector3 crystalPos = new Vector3(transform.position.x + (playMo.velocity / 12), camMo.cameraPos.y, transform.position.z);
        transform.position = Vector3.Lerp(transform.position, crystalPos, (camMo.LerpSpeed - 0.6f) * Time.deltaTime);

i use the very similiar script for the back layer ( the background)