My character cant jump

Hey all, I've been following a simple platformer tutorial as my first project. After creating the script for movement I tried to adding the script to jump. I have no errors in my code when Unity checks the script but when I test my game the character dont jump. I already checked the axis name and the buttons assigned but everything is ok. Could somebody help me please? Here is my script:

public class PlayerController : MonoBehaviour {

 //Movement variables
 public float maxspeed;

 //Jumping Variables
 bool grounded = false;
 float groundcheckradius = 0.2f;
 public LayerMask groundlayer;
 public Transform groundcheck;
 public float Jumpheight;
 
 Rigidbody2D mybody;
 Animator myanim;
 bool facingright;    


 // Use this for initialization
 void Start () {
     mybody = GetComponent<Rigidbody2D> ();
     myanim = GetComponent<Animator> ();

     facingright = true;
 }
 
 // Update is called once per frame
 void update(){
     if (grounded && Input.GetAxis ("Jump") > -10)
     {
         grounded = false;
         myanim.SetBool ("Isgrounded", grounded);
         mybody.AddForce (new Vector2 (0, Jumpheight));
     }
 }


 void FixedUpdate () {
     
     //Check if we are grounded if no we are falling
         grounded = Physics2D.OverlapCircle(groundcheck.position,groundcheckradius,groundlayer);
         myanim.SetBool("Isgrounded",grounded);

         myanim.SetFloat("Verticalspeed",mybody.velocity.y);

     

     float move = Input.GetAxis ("Horizontal");
     myanim.SetFloat("Speed", Mathf.Abs(move));

     mybody.velocity = new Vector2 (move * maxspeed, mybody.velocity.y);
     
     if (move > 0 && !facingright)
     {
         flip();
     }
     else if(move < 0 && facingright)
     {
         flip();
     }
     
 }
 void flip() {
     
     facingright = !facingright;
     Vector3 theScale = transform.localScale;
     theScale.x *= -1;
     transform.localScale = theScale;        
 }

}