My roll a ball don't move when I play and now I cannot view it properly

this is my code

using UnityEngine;
using System.Collections;

public class PlayerController : MonoBehaviour {

    public float speed;

    private Rigidbody rb;

    void Start ()
    {
        rb = GetComponent<Rigidbody>();
    }

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

        Vector3 movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);

        rb.AddForce(movement * speed);
    }

}

I have already added speed here is a screenshot

and now I cannot view it like this? it’s always the above screnshot, help?

You are in game view mode. Note the tabs that say ‘Scene, Game, Asset store’ (on the top left). To change view in your scene go into scene mode. In scene mode you can edit position etc. Game mode is what you game looks through the camera in the scene. Let me know if this helps.