/// <summary>
/// Moves the snake one cell in the direction specified by MovementDirection.
/// </summary>
public void Move()
{
int x = Head.Cell.X;
int y = Head.Cell.Y;
if (MovementDirection.GetAxis() == Axis2D.X)
{
x += MovementDirection.Sign();
}
else
{
y += MovementDirection.Sign();
}
_history.AddFirst(new MovementNode(PlayArea[x, y], MovementDirection));
_history.RemoveLast();
}
