Start button won't work for title menu

Yo, I’m making a title screen and everything is working in the code so far except for the start button, below is the code. There’s no errors or anything popping up. Please help, thanks.

using UnityEngine;
using System.Collections;

public class MenuObject1 : MonoBehaviour
{
public bool isQuit = false;

// When Hovered Turn Object Red
void OnMouseEnter() 
{
	renderer.material.color = Color.red;
}

// When not hovered turn color back
void OnMouseExit() 
{
	renderer.material.color = Color.blue;
}
// If button Start is clicked, level load, else the game will quit
void onMouseDown()
{
	if(isQuit)
	{
	Application.Quit();
	}
	else
	{
		Application.LoadLevel(1);
	}

}

}

Here’s how the code should look. The ‘o’ needed to be capitalized. :wink:

using UnityEngine;
using System.Collections;

public class MenuObject1 : MonoBehaviour {
    public bool isQuit = false;

    // When Hovered Turn Object Red
    void OnMouseEnter()
    {
        renderer.material.color = Color.red;
    }

    // When not hovered turn color back
    void OnMouseExit()
    {
        renderer.material.color = Color.blue;
    }

    // If button Start is clicked, level load, else the game will quit
    void OnMouseDown()
    {
        if(isQuit)
        {
            Application.Quit();
        }
        else
        {
            Application.LoadLevel(1);
        }
    }
}