Klondike, rebuilt from scratch in Swift/SpriteKit with obsessive attention to touch. Cards are snappy and physical: drag a row, scrub to cut a stack, flick to the foundation, haptics on every move. It's the same game you already know, with the input model it never had. Daily challenge – Everyone gets the same deal, compete on a Game Center leaderboard, keep a streak. Insight mode – Tells you if your current board is still winnable, and rewinds you to the last move where it was.