Press the Windows logo key +PrtScn. The file is saved to the Screenshots folder in your Pictures folder. You can also us the Snipping Tool which is available in all versions of Windows Vista, 7, and 8 except the Starter and Basic editions.
To take a screenshot with your Mac, Command + Shift + 3 and then release all keys to captuer the whole screen, or press Command + Shift + 4 and press down and drag the mouse over the area you'd like to capture.
To take a screenshot with your iPhone or iPod Touch, press and hold the sleep/wake button and then click the Home button.
Take a Screenshot with Android 4.0 (Ice Cream Sandwich) just press and hold the Volume Down and Power buttons at the same time.
Just like other apps in our series, the more you get into each level, the more it changes. There are theoretically infinite ways you can complete each, it makes for great fun.
You can also top the leaderboard and earn medals! (bronze, silver and gold). There's 150 levels to solve right now, intertwined with all sorts of tweaks and surprises. You can also go back and replay any level you've already passed, at any time (Choose Level). If you're stuck on a really tricky level, skip it! (Tap Skip on the Fail Screen) If you can't wait, unlock all 150 levels and replay at your own pace! (Choose Level > Unlock All Levels)
Thanks for all your support, I hope you're enjoying the "focus" series thus far.