How Do I Simply Turn This App Off?

I have the Amplitube app on my iPod. When Im done with it I tap out of the app yet it persists in pulsating on a red banner that hijacks the top of my screen. How do I simply pull the plug on this app for now without deleting it entirely? Wheres the OFF switch? Tried to contact you through the app but the COUNTRY menu does not pull down so nothing can be sent. Im gonna have to delete my Amplitude apps now because I cant simply quit them.

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