build not working right , script added

MY game works in the unity preview but not when i build it , mac version ( I only have a mac )

It is just the starting level where an eagle should collect 12 orbs to learn how to fly .

The orbs (pickup) should disappear when the eagle ( player) passes through them , and a sound should play , in the mac build when the eagle hits an orb, it moves off in a direction and keeps going , no sound plays either . I think this is the problem script but i have not tried to make a build since i upgraded to 5.3 from 4 so it could be anything .

using UnityEngine; using System.Collections;

public class pickUps : MonoBehaviour {

 public float  speed;
 public GUIText countText;
 public GUIText winText;
 public AudioClip droplet;
 private int count;
 private AudioSource source;
 
 
 void Start ()
 {
     source = GetComponent<AudioSource>();
     count = 0;
     winText.text = "test";
     SetCountText ();
     
 }
 
 void FixedUpdate ()
 {
     gameObject.GetComponent<Renderer>().material.color = Color.green;
     float moveHorizontal = Input.GetAxis("Horizontal");
     float moveVertical = Input.GetAxis("Vertical");
     
     Vector3 movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);
     
     GetComponent<Rigidbody>().AddForce(movement*speed);

 }
 
 void OnTriggerEnter(Collider other) 
 {
     if(other.gameObject.tag == "PickUp") 
     {
         other.gameObject.SetActive(false);
         count = count + 1;
         SetCountText ();
         source.PlayOneShot(droplet,1f);
         
     }
 }
 void SetCountText ()
 {
     countText.text = "Count: " + count.ToString();
     if(count >= 12)
     {
         winText.text = "Task completed  - Press Escape to Quit";
     }
 }

}