gistfile1.txt

using UnityEngine;
using System.Collections;

public class Jump : MonoBehaviour {

	public float Jumppower = 3;
	public LayerMask groundLayer;

	void Start () {
	
	}


	void Update () {

		RaycastHit2D hit = Physics2D.Linecast (
			transform.position,
			transform.position - transform.up * 1.2f,
			groundLayer);

		if (Input.GetKey (KeyCode.Space) && hit.collider != null) {
			Vector2 Jump = new Vector2(0,Jumppower);
			rigidbody2D.velocity = Jump * Jumppower;
			audio.Play();
		}

	}
}