Just wanted to clear something up. Say for example I load up Angry Birds, play a few levels, go back to the main menu of AG's then go to the iPhone home screen and do something else. When I go back to Angry Birds later in the day it stays on the game's main menu. Does this waste battery or is there a way to close the app entirely so when I play it again it opens up fresh? The reason I ask is because when I do this my battery seems to go down more than on the 3GS before multi-tasking when the app would close completely.