How do I revoke access to twitter for a single app on iOS 5?
Reply from Rovio, maker of the game:


  This feature has been done in cooperation with Twitter Inc. Thus, players of Angry Birds Star Wars who have also Twitter accounts got the chance to post the info of their favorite characters on Twitter. Unfortunately we do not have any tool to disconnect Twitter from our game at the moment. However, you can use the 'manage account' option in Twitter app and remove your account on Twitter before your children start playing the game, or disable the internet connection on your device.
  
  To log out of your Twitter account, launch the Twitter app and go to "Manage accounts" (it's the button next to the settings button on your Twitter profile page). Then remove your default account. When you wish to tweet again, just log in to the app and you're good to go!
  
  We are still working on developing this feature for future updates, so we apologize for any inconvenience this might cause. Hope you enjoy the game!
  
  Best regards,
  
  Kalle
  
  Rovio Support Team