/// <summary>
/// Allows the game to run logic such as updating the world.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Update(GameTime gameTime)
{
if (Keyboard.GetState().IsKeyDown(Keys.Escape))
{
this.Exit();
}
zombie.Update(gameTime);
map.Update(gameTime);
base.Update(gameTime);
}
