If performance is slow or if you experience crashing, try quitting other apps, power-cycling your device, or resetting your device. This app combines high-definition, 3D graphics with extensive, interactive functionality. Both are demanding of the iPad 2's memory and processor. Quitting other apps, power-cycling your device, or resetting your device should improve functionality.
To quit other apps, double-click the Home button on the bottom of your iPad 2 to reveal all running apps. Then, tap and hold on one of the app icons in the bottom bar. When the red circle with the minus sign appears, tap that circle to quit the app. When you're done quitting all running apps, click the Home button twice to go back to your home screen.
To power-cycle your device, press and hold the Sleep/Wake button on top of your iPad 2 until the "slide to power off" arrow appears. Slide the arrow to the right. After waiting a few seconds, press and hold the Sleep/Wake button to power on your iPad 2 again.
To reset your device, press and hold the Sleep/Wake button and the Home button at the same time for at least ten seconds, until the Apple logo appears.