Need health to decrease with movement in Javascript

No errors, but what I’ve got doesn’t work and I cannot figure out why. All I’m looking for is the variable called health to go down by 1 point with every movement in the inspector. The script is attached to a player prefab. N.B. Even if I change the value of the variable in the script it remains the same in the inspector. Here’s the code. Some help would be much appreciated.

#pragma strict

var hit : RaycastHit;

var utran;

var newTile : GameObject;

public var health : int;

function Start () {

health = 300;

}

function Update () {

utran = new Vector3 (transform.position.x, transform.position.y, transform.position.z-0.5);

if (Input.GetKeyUp(KeyCode.A))
{
	if (Physics.Raycast (transform.position, -Vector3.right, hit, 25))
	{
		if (hit.transform.tag == "Floor" || hit.transform.tag == "Exit" || hit.transform.tag == "Tassel")
		{
			transform.position.x -= 2.75;
			health -= 1;
		}
	}
}

if (Input.GetKeyUp(KeyCode.D))
{
	if (Physics.Raycast (transform.position, Vector3.right, hit, 25))
	{
		if (hit.transform.tag == "Floor" || hit.transform.tag == "Exit" || hit.transform.tag == "Tassel")
		{
			transform.position.x += 2.75;
			health -= 1;
		}
	}
}

if (Input.GetKeyUp(KeyCode.W))
{
	if (Physics.Raycast (transform.position, Vector3.up, hit, 25))
	{
		if (hit.transform.tag == "Floor" || hit.transform.tag == "Exit" || hit.transform.tag == "Tassel")
		{
			transform.position.y += 2.75;
			health -= 1;
		}
	}
}

if (Input.GetKeyUp(KeyCode.S))
{
	if (Physics.Raycast (transform.position, -Vector3.up, hit, 25))
	{
		if (hit.transform.tag == "Floor" || hit.transform.tag == "Exit" || hit.transform.tag == "Tassel")
		{
			transform.position.y -= 2.75;
			health -= 1;
		}
	}
}


if (Physics.Raycast (utran, Vector3.forward, hit, 5))
{
	if (hit.transform.tag == "Exit")
	{
		Application.LoadLevel(Application.loadedLevel);
	}
}

if (Physics.Raycast (utran, Vector3.forward, hit, 5))
{
	if (hit.transform.tag == "Tassel")
	{
		Destroy (hit.transform.gameObject);
		Instantiate (newTile, hit.transform.position, hit.transform.rotation);
	}
}

}

Can you please print health instead of checking it out in the inspector, sometimes it doesn’t update properly.