PlayerControls.cs

using UnityEngine;
using System.Collections;

public class PlayerControls : MonoBehaviour {

    //Declarations
    //Player
    public GameObject player;
    //Player Location
    public float xPos;
    public float yPos;

    public Vector3 playerLocation;
    public Vector3 playerAngle = new Vector3(270, 0, 0);
    //Counting shit
    public float distance = 0.25f;

    //Shooting Objects
    public GameObject playerBullet;
    public GameObject leftCanon;
    public GameObject rightCanon;

    public Vector3 posRightCanon;
    public Vector3 posLeftCanon;

    public Rigidbody projectile;
    public GameObject leftBullet;
    public GameObject rightBullet;

    public float thurst = 15.0f;

    // Use this for initialization
    void Awake()
    {
        xPos = 0.0f;
        yPos = -5.0f;
    }

    void Start ()
    {

        transform.position = playerLocation;
	}
	
	// Update is called once per frame
	void Update ()
    {
        if (transform.eulerAngles != playerAngle)
            transform.eulerAngles = playerAngle;

        //Movement------------------------------------------------------------------------------------------------------------
        //Left
        if (Input.GetKey(KeyCode.A))
        {
            if (xPos >= -17)
            {
                xPos = xPos - distance;
            }
        }
        //Right
        if (Input.GetKey(KeyCode.D))
        {
            if (xPos <= 16)
            {
                xPos = xPos + distance;
            }
        }
        //Up
        if (Input.GetKey(KeyCode.W))
        {
            if (yPos <= 11)
            {
                yPos = yPos + distance;
            }
        }
        //Down
        if (Input.GetKey(KeyCode.S))
        {
            if (yPos >= -5)
            {
                yPos = yPos - distance;
            }
        }

        //Player Location Change ----------------------------------
        playerLocation = new Vector3(xPos, yPos, 5.0f);
        transform.position = playerLocation;

        //Shooting-------------------------------------------------------------------------------------------------------------------------------------------
        //Canon positions


        posLeftCanon = new Vector3(leftCanon.transform.position.x, leftCanon.transform.position.y + 0.5f, leftCanon.transform.position.z);
        posRightCanon = new Vector3(rightCanon.transform.position.x + 1.21f, rightCanon.transform.position.y + 0.5f, rightCanon.transform.position.z);

        //Spawn Bullets
        if (Input.GetKeyDown(KeyCode.Space))
        {
            leftBullet = (GameObject) Instantiate(playerBullet, posLeftCanon, transform.rotation);
            iTween.MoveTo(leftBullet, new Vector3(leftBullet.transform.position.x, leftBullet.transform.position.y + 20, 5), 1);
            rightBullet = (GameObject)Instantiate(playerBullet, posRightCanon, transform.rotation);
            iTween.MoveTo(rightBullet, new Vector3(rightBullet.transform.position.x, rightBullet.transform.position.y + 20, 5), 1);

        }

    }
}