private void OnKeyUp(Event e)
        {
            if (IsGoalOnScreen)
            {
                return;
            }
            var key = e.As <KeyboardEvent>().GetKey();

            switch (key)
            {
            case Key.Up:
                isMoving = false;
                caveMan.GotoAndStop(0);
                break;

            case Key.Left:
                if (isRotating && rotation == Direction.Left)
                {
                    isRotating = false;
                }
                break;

            case Key.Right:
                if (isRotating && rotation == Direction.Right)
                {
                    isRotating = false;
                }
                break;

            default: return;
            }
        }