应用场景：unity写一个FIFA21足球游戏里的球员c#脚本代码

using UnityEngine;

public class PlayerController : MonoBehaviour { public float speed = 10f; public float jumpForce = 500f; public float shootForce = 1000f; public GameObject ball; private Rigidbody rb; private bool isJumping = false;

void Start()
{
    rb = GetComponent<Rigidbody>();
}

void Update()
{
    float moveHorizontal = Input.GetAxis("Horizontal");
    float moveVertical = Input.GetAxis("Vertical");

    Vector3 movement = new Vector3(moveHorizontal, 0.0f, moveVertical);

    rb.AddForce(movement * speed);

    if (Input.GetKeyDown(KeyCode.Space) && !isJumping)
    {
        rb.AddForce(Vector3.up * jumpForce);
        isJumping = true;
    }

    if (Input.GetKeyDown(KeyCode.Mouse0))
    {
        GameObject ballInstance = Instantiate(ball, transform.position + new Vector3(0, 1, 0), Quaternion.identity);
        ballInstance.GetComponent<Rigidbody>().AddForce(transform.forward * shootForce);
    }
}

void OnCollisionEnter(Collision collision)
{
    if (collision.gameObject.CompareTag("Ground"))
    {
        isJumping = false;
    }
}