racrally said:
This is a ram issue at work here.....the iPad 1 has 256mb of ram the iPad 2 512mb and the new iPads have 1gb. With apps only getting bigger the iPad 1 is now struggling. There are steps you can take to minimise this happening, when starting your game, first close completely all other apps, even when not running, these apps can still be using some ram. Limit your location services to only the apps you are using now and go to Settings - Safari and clear your Cookies and History.
Now just to let it all settle in nicely do a reset of your iPad - Hold the power off button and the home button simultaneously, keep holding them in and you may see the power off slide appear and disappear, wait until you see the Apple logo appear before releasing the buttons. It will take a little longer for your iPad to start.
This should have you up and running....let us know.