BlackBerry 10 devices don't have a Home button because you can swipe up from the bottom edge of the screen to close apps. When you're using an app in landscape mode, such as “Angry Birds Space,” you're supposed to swipe up from the long edge of the device. Too bad it doesn't always work the first time. BlackBerry should also let you swipe up in portrait mode to close any app at any time, regardless of its orientation. This worked when “Jetpack Joyride” was paused but not while the game was running. It's not like the iPhone or Galaxy S4's home button stops working based on how you're holding the phone or the state of the app.