Help! How can I get my power up script to work?

I am making a retro-like Metroidvania game and am building a test level to test all my power ups, and I am trying to make one that lets the player run faster this is my script so far NOTE: Needs to be in JavaScript : #pragma strict

var Speed : float = 12;

function Update () 
{

if (Input.GetKey (KeyCode.Space))  
{
transform.Translate(Vector3(0,Speed,0) * Time.deltaTime);
}

if (Input.GetKey (KeyCode.A)) 
{transform.localScale.x = 1;
transform.Translate(Vector3(-Speed,0,0) * Time.deltaTime);
}

if (Input.GetKey (KeyCode.D)) 
{
transform.localScale.x = 1;
transform.Translate(Vector3(Speed,0,0) * Time.deltaTime);
}

}

 function OnTriggerEnter(other : Collider)
 {
      if(other.tag == "SuperSpeed");
      {
           Destroy(GameObject.FindWithTag ("SuperSpeed"));
           Speed = Speed + 8;
      }
 
 }

yuck, i would write a seperate script for the powerup and have an “effect” on it

(im not going to apologise for using c# because imo its better :P)

like

using UnityEngine;
using System.Collections;

public class bonusPickup : MonoBehaviour {

	// Use this for initialization

	public float speedBonus;
	public float healthBonus;
	public float jumpBonus;

	void Start () {
	//this can be a speedBoost although i would usually make prefabs for each one instead of coding
    //that way you can make something like smallBoost = 4 bigBoost = 8 or whatever
	speedBonus = 8f;
	}
	
	// Update is called once per frame
	void Update () {
	
	}
}

and then on the player

using UnityEngine;
using System.Collections;

public class playerScript : MonoBehaviour {

	// Use this for initialization
	private float speed = 2f;
	private float health = 100f;
	private float jumpHeight = 1f;


	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {
	
	}

	void OnCollisionEnter(Collision collision)
	{
		if(collision.gameObject.tag == "powerup")
		{
			bonusPickup tempPowerup;
			tempPowerup = collision.gameObject.GetComponent<bonusPickup>();
			speed += tempPowerup.speedBonus;
			health += tempPowerup.healthBonus;
			jumpHeight += tempPowerup.jumpBonus;
                    Destroy(collision.gameObject);
		}
	}
}