Supermarket Mania for the iPhone is updated with high-resolution visuals for the iPhone 4 Retina Display and supports iOS 4.0! Also, the game is now available on Facebook and everyone can play it for free anytime!To celebrate this, we are running a contest. Post an achievement for 3K trophy on your Facebook wall and let us know by commenting on the contest description on Facebook! Two first players to post an achievement and a randomly selected one will win $10 iTunes Gift Certificates. Results will be announced next Thursday, September 2nd!