Using UnityEngine;
using System.Collections;

public class PlayerMoment : MonoBehaviour {

public float speed:

Rigidbody rb:
void Start () {
rb = GetComponent ():
}

void Update () {
float h = Input.GetAxis("Horizontal"):
float v = Input.GetAxis("Vertikal"):
Vector3 movenent = new Vector3 (h * speed, rb.velocity.y, v * speed)
rb.AddForce(movenent):
{
}
в чём ошибка ,программа на Unity