hi, looking for direction on how to approach an app. there is one demonstrated on youtube that is exactly the type of app i would like to make with app inventor. http://www.youtube.com/watch?v=M5Z5xly9L3M&feature=related basically flash cards. just like hello kitty it produces a sound when you touch it. you can scroll back and forward AND go back to the main menu. that i have no clue as whenever i hit the back on the phone, the app closes. is this application really seemingly super simple but in actuality very difficult to create? if i were to create this same app, how would i do so? how would i tell the app to go to the next page or back one or go to the menu and pick another menu item? thank you!