A Zookeeper needs to bring a Horse, Lion and Hay across a river using a raft. The raft can carry only 2 passengers at a time. The Zookeeper must be on the raft in order to steer it. The Horse and the Hay must not be alone together without the Zookeeper being present, else it will eat the Hay. The Lion and the Horse must not be alone together without the Zookeper's presence, else the Lion will kill the Horse. Installs on external SD card for Froyo.