Duda en unity (Movimiento personaje/ rotación)

using UnityEngine;
using System.Collections;

public class PlayerControl : MonoBehaviour
{
	[HideInInspector]
	public bool facingRight = true;			// For determining which way the player is currently facing.
	[HideInInspector]
	public bool jump = false;				// Condition for whether the player should jump.


public float moveForce = 365f;			// Amount of force added to move the player left and right.
public float maxSpeed = 5f;				// The fastest the player can travel in the x axis.
public AudioClip[] jumpClips;			// Array of clips for when the player jumps.
public float jumpForce = 1000f;			// Amount of force added when the player jumps.
public AudioClip[] taunts;				// Array of clips for when the player taunts.
public float tauntProbability = 50f;	// Chance of a taunt happening.
public float tauntDelay = 1f;			// Delay for when the taunt should happen.


private int tauntIndex;					// The index of the taunts array indicating the most recent taunt.
private Transform groundCheck;			// A position marking where to check if the player is grounded.
private bool grounded = false;			// Whether or not the player is grounded.
private Animator anim;					// Reference to the player's animator component.


void Awake()
{
	// Setting up references.
	groundCheck = transform.Find("groundCheck");
	anim = GetComponent<Animator>();
}


void Update()
{
	// The player is grounded if a linecast to the groundcheck position hits anything on the ground layer.
	grounded = isGround = Physics2D.OverlapCircle(groundCheck.position,groundRadius, whatIsGround);

	// If the jump button is pressed and the player is grounded then the player should jump.
	if(Input.GetButtonDown("Jump") && grounded)
		jump = true;
}


void FixedUpdate ()
{
	// Cache the horizontal input.
	float h = Input.GetAxis("Horizontal");

	// The Speed animator parameter is set to the absolute value of the horizontal input.
	anim.SetFloat("Speed", Mathf.Abs(h));

	// If the player is changing direction (h has a different sign to velocity.x) or hasn't reached maxSpeed yet...
	if(h * rigidbody2D.velocity.x < maxSpeed)
		// ... add a force to the player.
		rigidbody2D.AddForce(Vector2.right * h * moveForce);

	// If the player's horizontal velocity is greater than the maxSpeed...
	if(Mathf.Abs(rigidbody2D.velocity.x) > maxSpeed)
		// ... set the player's velocity to the maxSpeed in the x axis.
		rigidbody2D.velocity = new Vector2(Mathf.Sign(rigidbody2D.velocity.x) * maxSpeed, rigidbody2D.velocity.y);

	// If the input is moving the player right and the player is facing left...
	if(h > 0 && !facingRight)
		// ... flip the player.
		Flip();
	// Otherwise if the input is moving the player left and the player is facing right...
	else if(h < 0 && facingRight)
		// ... flip the player.
		Flip();

	// If the player should jump...
	if(jump)
	{
		// Set the Jump animator trigger parameter.
		anim.SetTrigger("Jump");

		// Play a random jump audio clip.
		int i = Random.Range(0, jumpClips.Length);
		AudioSource.PlayClipAtPoint(jumpClips[i], transform.position);

		// Add a vertical force to the player.
		rigidbody2D.AddForce(new Vector2(0f, jumpForce));

		// Make sure the player can't jump again until the jump conditions from Update are satisfied.
		jump = false;
	}
}


void Flip ()
{
	// Switch the way the player is labelled as facing.
	facingRight = !facingRight;

	// Multiply the player's x local scale by -1.
	Vector3 theScale = transform.localScale;
	theScale.x *= -1;
	transform.localScale = theScale;
}


public IEnumerator Taunt()
{
	// Check the random chance of taunting.
	float tauntChance = Random.Range(0f, 100f);
	if(tauntChance > tauntProbability)
	{
		// Wait for tauntDelay number of seconds.
		yield return new WaitForSeconds(tauntDelay);

		// If there is no clip currently playing.
		if(!audio.isPlaying)
		{
			// Choose a random, but different taunt.
			tauntIndex = TauntRandom();

			// Play the new taunt.
			audio.clip = taunts[tauntIndex];
			audio.Play();
		}
	}
}


int TauntRandom()
{
	// Choose a random index of the taunts array.
	int i = Random.Range(0, taunts.Length);

	// If it's the same as the previous taunt...
	if(i == tauntIndex)
		// ... try another random taunt.
		return TauntRandom();
	else
		// Otherwise return this index.
		return i;
}
}