void Update()
{
 float vertical = Input.GetAxis("Vertical");
 float horizontal = Input.GetAxis("Horizontal");

 transform.position += new Vector3(horizontal, vertical, vertical) * (Time.deltaTime * 3f);
 //transform.Translate(new Vector3(horizontal,vertical,vertical) *(Time.deltaTime * 3f));
 //RotateToTarget2D(transform, target.transform.position, 3f);
 //var transformPosition = target.transform.position - transform.position;

 if (Input.GetMouseButtonDown(0))
 {
 var mouse = Input.mousePosition;
 mouse = Camera.main.ScreenToWorldPoint(Input.mousePosition);
 mouse = new Vector3(mouse.x, mouse.y, this.transform.position.z);
 LaunchProjectile(mouse, 0);
 LaunchProjectile(mouse, 30);
 LaunchProjectile(mouse, -30);
 }
}

GameObject LaunchProjectile(Vector3 targetPoint, float angle)
{
 var projectileObject = Instantiate(projectile, this.transform.position,
 Quaternion.identity);
 projectileObject.transform.Rotate((GetQuaternionBetweenPoints(this.transform.position, targetPoint).eulerAngles
 + new Vector3(0,0, angle)));
 return projectileObject;
}

float GetAngleBetweenPoints(Vector3 self, Vector3 target)
{
 Vector3 selfToTargetVector = target - self;
 return Mathf.Atan2(selfToTargetVector.y, selfToTargetVector.x) * Mathf.Rad2Deg;
}

Quaternion GetQuaternionBetweenPoints(Vector3 self, Vector3 target)
{
 return Quaternion.AngleAxis(GetAngleBetweenPoints(self, target), Vector3.forward);
}