Mr. Qwak, the venerable developer of Amiga classic Qwak, has finally released the Retina-enhanced Qwak HD for the iPad. The game, a super-boosted remake of the 16-bit retro-lovely, features over 70 levels, a glorious soundtrack, cutesy graphics, a two-player mode and some impressively designed controls. As for the game itself, well, it is a simple yet rather excellent platformer that's absolutely worth the asking price.