Classic “Concentration” roots
The game traces back to mid-20th-century “Concentration” card decks—just shuffled pairs. Digital versions kept the core loop because it’s perfectly simple.
Match all pairs with the fewest moves and best time. Stars are based on your efficiency: fewer moves = more stars. Your best time for each board size is saved only on this device.
The game traces back to mid-20th-century “Concentration” card decks—just shuffled pairs. Digital versions kept the core loop because it’s perfectly simple.
Holding card locations in mind trains the same short-term memory you use for mental math and reading ahead in sentences.
Chasing 3-star runs teaches efficiency: fewer flips = better. It’s a kid-friendly way to feel what “optimal steps” means without formulas.
Similar-looking emojis (like 🐱 vs 🐯) increase interference, while distinct icons boost recall. Swapping themes actually tweaks difficulty.
Use the same seed to share an identical board for classroom races or “beat my time” challenges—no spoilers, just identical layouts.
— • — moves • ★★★