Increasing speed based on score

[TicTac]

I am having trouble increasing speed based on score. I think I know roughly what the formula is but the code I try doesn’t work.

var speed : int;
var manager : Manager_Script;
var hit : boolean = false;


function Start () {
	manager = GameObject.FindGameObjectWithTag("Manager").GetComponent(Manager_Script);

}

function Update () {
	
	transform.Translate(Vector3(0,(-1) * speed * Time.deltaTime,0));
}

function OnCollisionEnter(collision : Collision){
	if(collision.gameObject.tag == "Player"){
		speed = speed * player.playerScore
		Destroy(gameObject);
		manager.playerScore +=10;
		manager.cowsSaved ++;
		hit = true;
	}
	
	if(collision.gameObject.tag == "Ground"){
		Destroy(gameObject);
		manager.playerLives --;
	}
}

[Fornoreason1000]

ok, firstly initialize your variables, saves you reassigning them.
also don’t use Translate(it ignores collisions), use RigidBody.AddForce with gravity turned off and this code will work;