It should be clear by now that the software on this camera isn't just a bonus -- it's the Galaxy Camera's defining feature, and it's so engrossing that it's hard to goback to the closed-off, one-trick ways of a traditional shooter.
When the camera's completely switched off, hit the power button and you'll go straight into camera mode which lets you shoot immediately, then about half a minute later the interface seamlessly goes back to smart mode, which is when you can hit the back or home button to toggle the Android unlock screen (though we'd rather go straight into the home screen).