Unity PacMan

[computerg767]

so I am copying this exact tutorial on how to code pacman 

http://noobtuts.com/unity/2d-pacman-game

currently on 

The Movement Script

and type the code as it shows on the website. 

the code seems to work but when ever i use the arrow keys it doesnt want to do anything. 

Heres my code:

 

using UnityEngine;

using System.Collections;

 

public class PacmanMove : MonoBehaviour {

public float speed = 0.4f;

Vector2 dest = Vector2.zero;

 

void Start() {

dest = transform.position;

}

 

void FixedUpdate() {

// Move closer to Destination

Vector2 p = Vector2.MoveTowards(transform.position, dest, speed);

rigidbody2D.MovePosition(p);

 

// Check for Input if not moving

if ((Vector2)transform.position == dest) {

if (Input.GetKey(KeyCode.UpArrow) && valid(Vector2.up))

dest = (Vector2)transform.position + Vector2.up;

if (Input.GetKey(KeyCode.RightArrow) && valid(Vector2.right))

dest = (Vector2)transform.position + Vector2.right;

if (Input.GetKey(KeyCode.DownArrow) && valid(-Vector2.up))

dest = (Vector2)transform.position - Vector2.up;

if (Input.GetKey(KeyCode.LeftArrow) && valid(-Vector2.right))

dest = (Vector2)transform.position - Vector2.right;

}

}

 

bool valid(Vector2 dir) {

// Cast Line from 'next to Pac-Man' to 'Pac-Man'

Vector2 pos = transform.position;

RaycastHit2D hit = Physics2D.Linecast(pos + dir, pos);

return (hit.collider == collider2D);

}

}

If you could help me that would great!