The pickups aren't rotating on the spot, but around the screen. My player game object also isn't receiving input from my keyboard. What is going on?

My code: Player code: using UnityEngine; using System.Collections;

public class PlayerController : MonoBehaviour {

 public float speed;

 private Rigidbody2D rb2d; 

 void Start()
 {
     
     rb2d = GetComponent<Rigidbody2D> (); 
 }


 void FixedUpdate()
 {
     
     float moveHorizontal = Input.GetAxis ("Horizontal");
 
     float moveVertical = Input.GetAxis ("Vertical");
     
     Vector2 movement = new Vector2 (moveHorizontal, moveVertical);

     rb2d.AddForce (movement * speed);
 }

} 2d asset rotation code: using UnityEngine; using System.Collections;

public class Rotator : MonoBehaviour {

 void Update () 
 {
     transform.Rotate (new Vector3 (0, 0, 45) * Time.deltaTime);
 }

}

3d asset rotation code: using UnityEngine; using System.Collections;

public class Rotation : MonoBehaviour {

 // Update is called once per frame
 void Update () {
     transform.Rotate (new Vector3 (15, 30, 45) * Time.deltaTime);

 }

}