Why does my character never stop jumping?

using UnityEngine; using System.Collections;

public class PlayerController : MonoBehaviour { public float maxSpeed = 10f; bool facingRight = true;

 Animator anim;

 bool grounded = false;
 public Transform groundCheck;
 float groundRadius = 0.2f;
 public LayerMask whatIsGround;
 public float jumpForce = 700f;

 void Start () 
 {
     anim = GetComponent<Animator>();
 }

 void FixedUpdate () 
 {
     grounded = Physics2D.OverlapCircle (groundCheck.position, groundRadius, whatIsGround);
     anim.SetBool ("Ground", grounded);

     anim.SetFloat ("vSpeed", GetComponent<Rigidbody2D>().velocity.y);

     float move = Input.GetAxis ("Horizontal");

     anim.SetFloat ("Speed", Mathf.Abs (move));

     GetComponent<Rigidbody2D>().velocity = new Vector2 (move * maxSpeed, GetComponent<Rigidbody2D>().velocity.y); 

     if (move > 0 && !facingRight)
         Flip ();
     else if (move < 0 && facingRight)
         Flip();
 }

 
 void Update ()
 {
     if (grounded && Input.GetKeyDown(KeyCode.Space));
     {
         anim.SetBool("Ground", false);
         GetComponent<Rigidbody2D>().AddForce(new Vector2(0, jumpForce));
     }
 }

 void Flip ()
 {
     facingRight = !facingRight;
     Vector3 theScale = transform.localScale;
     theScale.x *= -1;
     transform.localScale = theScale;
 }

}