PlayerCtrl.cs

using UnityEngine;
using System.Collections;

public class PlyCtrl : MonoBehaviour {
    public float Speed = 8;
    public float Accel = 12;
    public float Gravity = 20;
    public float JumpHeight = 12;
    private float GroundDistance;
    private float CurrentSpeed;
    private float TargetSpeed;
    private Vector3 Target;
    private Transform Targt;
    private float StepSpeed;
    private Vector3 moveDirection = Vector3.zero;
    private bool isMoving = false;
    // Use this for initialization
    void Start () {

    }

    // Update is called once per frame
    void Update () {
        CharacterController controller = GetComponent<CharacterController>();
        TargetSpeed = Input.GetAxis("Horizontal") * Speed;
        if(TargetSpeed != 0){
            if(Input.GetKey(KeyCode.RightArrow) || Input.GetKey(KeyCode.D)){
                moveDirection.x=Speed/4;
                controller.Move (moveDirection * Time.deltaTime * Speed);
            }
            if(Input.GetKey(KeyCode.LeftArrow ) || Input.GetKey(KeyCode.A)){ moveDirection.x=-Speed/4; isMoving=true; }//transform.rotation.y=-180;}
            if (isMoving == true) {
                controller.Move (moveDirection * Time.deltaTime * Speed);
            }
        }

        if (controller.isGrounded) {
            if (Input.GetButton ("Jump")) {
                moveDirection.y = JumpHeight;
                controller.Move (moveDirection * Time.deltaTime * (Speed*12));
            }
        } else { //Fall
            moveDirection.y = -Gravity/2;
            controller.Move (moveDirection * Time.deltaTime * (Speed/2));
        }
    }

    ////////////END OF CLASS////////////
}