GameCanvas Template

using UnityEngine;
using System.Collections;
using UnityEngine.UI;

/*
 http://stackoverflow.com/questions/36809687/ui-canvas-image-with-ui-buttons
 */

public class GameCanvas : MonoBehaviour
{
    public Button pauseButton;
    public Button jumpButton;

    public Canvas pauseCanvas;

    void OnEnable()
    {
        //Register Button Events
        pauseButton.onClick.AddListener(() => buttonCallBack(pauseButton));
        jumpButton.onClick.AddListener(() => buttonCallBack(jumpButton));
    }

    private void buttonCallBack(Button buttonPressed)
    {
        //Pause Button Pressed
        if (buttonPressed == pauseButton)
        {
            //Pause Game here

            //Hide Game UI
            gameObject.SetActive(false);

            //Show Pause UI
            pauseCanvas.gameObject.SetActive(true);
        }

        //Jump Button Pressed
        if (buttonPressed == jumpButton)
        {
            jump();
        }

    }

    public void jump()
    {
        //Put your jump code here
        Debug.Log("Jumped");
    }

    void OnDisable()
    {
        //Un-Register Button Events
        pauseButton.onClick.RemoveAllListeners();
        jumpButton.onClick.RemoveAllListeners();
    }

}