void FixedUpdate()
 {
     if (hasControl)
     {
         //jump
         if (Input.GetKey(KeyCode.UpArrow) && playerPhysics.isGrounded)
         {
             playerPhysics.Jump();
         }
         //slide
         if (Input.GetKeyDown(KeyCode.DownArrow))
         {
             playerPhysics.Slide();
         }
         playerPhysics.GetInput(Input.GetKey(KeyCode.RightArrow), Input.GetKey(KeyCode.LeftArrow));
     }
 }