Doodle Jump has released a free update, available now, that not only brings out that underwater content that Igor Pusenjak promised us in that interview a little while back, but also updates the graphics on the app to take full advantage of the iPhone 4's Retina Display, so you can see the little doodle jumping up those platforms clearer and sharper than ever. Only three stages have been updated with Retina Display graphics so far, but Pusenjak says that "the rest of the Retina Display graphics is almost done and we'll be releasing it soon!" The update is of course free for the game's own
