Instructions
Tap the "Angry Birds" icon on the iPad's home screen. Wait for the game to load and then tap the "Play" button once and scroll to an episode you haven't unlocked yet. Center that episode's graphic on the screen.
Press the "Home" button on the iPad to exit the app. Double-tap the "Home" button to open the multitask display. Press and hold the "Angry Birds" icon for a few seconds and tap the "X" badge that appears on the icon. Now, you have fully closed the app and removed it from the system's memory.
Tap the "Angry Birds" icon to launch the application again. This time, tap your middle finger rapidly in the center of the screen where the "Play" button will appear. Keep tapping your finger on the screen until the levels appear in the previously locked episode.
Tap the "1" level icon in the now unlocked episode. Play the game and beat the level as you normally would. Once you beat level one with this "Angry Birds" hack, all levels are automatically unlocked in that episode.