codigo para que un sprite tenga movimiento de izquieda a derecha brinque y colisione con un sprite de suelo, que tenga animaciones de correr y saltar

ng UnityEngine;
using System.Collections;

public class PlayerMovement : MonoBehaviour {

    public float speed = 5f;
    public float jumpForce = 10f;
    public float gravity = 20f;
    public float airControl = 0.5f;
    public float airControlMax = 1f;
    public float airControlMin = 0.5f;
    public float airControlSpeed = 0