/// <summary>
/// Allows the game to run logic such as updating the world,
/// checking for collisions, gathering input, and playing audio.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Update(GameTime gameTime)
{
_currentGameState.HandleInput(gameTime);
_currentGameState.Update(gameTime);
base.Update(gameTime);
}