一円玉の中の五十円 (The 50-Yen Coin Among One-Yen Coins)
By ひとり工房 (@4pW7EnF1ZnKDjHB)
Search a pile of 12,000 one-yen coins for a single 50-yen coin. Click and drag coins to uncover it, then carry the target to the red box. Moving one-yen coins into the box earns points that unlock sorting tools.
Enable JavaScript to play this browser game.