Why my Gui.button dont are displyed um my scene?

Questions & Answers
1

I’ll trying to create a menu but my gui’s dont show.

using UnityEngine;
using System.Collections;
using UnityEngine.SceneManagement;

public class Menu : MonoBehaviour {
void Start()
{

}
void OnGui()
{
    GUI.color = Color.white;
    if (GUI.Button(new Rect(Screen.width / 2, Screen.height / 2, 100, 25), "BANG!"))
    { 
        SceneManager.LoadScene("first");
    }
}

}

2

Try changing your method name to reflect the correct casing of the method(documentation stating as much).

You have “OnGui()” above, should be “OnGUI()”, case matters.