private void Start()
{
body = GetComponent <Rigidbody2D>();
collider = GetComponent <BoxCollider2D>();
landPosition = transform.position;
flySystem = new FlySystem();
groundCheckSystem = new GroundCheckSystem();
flySystem.SetupForces(_initialImpulse, _thrusterForce);
flySystem.SetupFuel(_maxFuel, _impulseCost);
}