價格：免費
檔案大小：56.4 MB
版本需求：需要 iOS 8.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
Classic puzzle that consists of a frame of 4x4 numbered square tiles in random order with one tile from 1 to 15. The goal: arrange the numbers sequentially from left to right and top to bottom, starting with the knuckles with the number 1 in the upper left corner.
支援平台：iPhone