How to load a level

Questions & Answers
1

I am trying to load a level after a button is pressed. I looked through this page: Load scene on button press - Questions & Answers - Unity Discussions
And followed what they said but it did not work, I also read this page:
Unity - Scripting API: Application.LoadLevel
And yet I still can not figure it out. Here is my code:
using UnityEngine;
using System.Collections;

public class Play : MonoBehaviour {

// Use this for initialization
void onMouseDown () {
    Application.LoadLevel("Level1");
}

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

}

}

2

Make sure you added your level at the build settings.

File → Build Settings → Add current.

3

There is a typo. It should be OnMouseDown (capital letter) instead of onMouseDown.

But there are other things to check, too:

OnMouseDown and similar functions are called when you click on an object that has a collider (you actually have to hit the collider, not only the mesh) or a GUIElement component, such as GUIText or GUITexture AND if that object has a script attached to it with a OnMouseDown() method.

In case you’re working with the new UI system, this is not the way to go. In short: using the new UI system allows you to subscribe to events, e.g. onClick for buttons. But that’s another story.