From Wikipedia: Zoo Keeper is a tile-matching puzzle video game developed for the Web by Robot Communications and later ported to the Nintendo DS by Japanese video game publisher Success. Zoo Keeper was released for arcades in 2004.[1] The game was then brought to American and European shores by Ignition Entertainment, and has since been released for iOS and Android devices under the title Zookeeper DX Touch Edition by Kiteretsu.[2][3]