價格：免費
更新日期：2017-02-02
檔案大小：19.2 MB
目前版本：1.0.1
版本需求：需要 iOS 6.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
A deceptively simple game. Tap the expanding circles to score points. But when the circles touch each other, they disappear and you score nothing. Prime numbers count as double, so try to wait for a prime. When the red circle appears, your time is up. Getting a high score takes a combination of patience, strategy and dexterity.
支援平台：iPhone, iPad