/// <summary>
 /// This method sets the _rigidBody and _spriteRenderer field to those of our character's GameObject, and we create a reference for our MovementData instance.
 /// </summary>
 /// <remarks>
 /// Start() is called on the frame when a script is enabled just before any of the "Update" methods are called the first time.
 /// </remarks>
 public void Start()
 {
     _movementData   = MovementData.GetMovementData();
     _rigidBody      = GetComponent <Rigidbody2D>();
     _spriteRenderer = GetComponent <SpriteRenderer>();
 }