Sold in versions called Amazing, Groovy, and Undecided, PureGear's new Retro Game Cases ($30 each) are soft and hard plastic iPhone protectors, each with a different classic game built into the back. Amazing is a series of concentric circles with gaps, enabling you to move three metal balls inside a simple maze; Groovy is a more complex line-based maze with a single ball; and Undecided is a pachinko-style collection of pegs with a launcher to help…
