How can i make a main menu?

I make to make a main menu, i am trying to use 3D text and a Cube as the background but i’m having problems when i click on the 3D Text for it to go to the next sence, some is wrong with MonoDevelop, i check over and over to see if my script is correct and it is… For example: if i am a button (3d Text) to go to Help Menu and i write my Script as in:

var help : boolean;
var option : boolean;

function OnMouseUp()
{

  if(help)
  {
  Application.LoadLevel(1);
  }

  else if(option)
  {
  Application.LoadLevel(2);
  }
}

it will not go to help but go to option, and i check to see if the button is check for help in the inspector…

Just something I had done previously it may help although it is in C# so you probably have to change it. Hopefully thats it helps.

public class Menu : MonoBehaviour {

public bool isQuit = true;

void OnMouseEnter()
{
	renderer.material.color = Color.red;
}
void OnMouseExit()	
{
	renderer.material.color = Color.yellow;
}

void OnMouseDown()
{
	if(isQuit)
	{
		Application.Quit();
	}
	else
	{
		Application.LoadLevel("Main");
	}
}

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

}

}