title: Libgdx: Pause menu and Pause state
body: <p>I have a question regarding the pausing/freezing a game while a window/pausemenu will appear at center of the screen. I've already created a pausescreen class which will be called each time the back key is being pressed. </p>
  
  <p>My problem is that I don't know how to freeze or put the game to pause, this becomes a problem because whenever i tried to click on the outsides of the pause window the player could move around.</p>