The game's objective is to traverse an island. New areas can be unlocked by spending in-game coins. These coins are obtained by cleaning up litter, cleaning up goop and in turn saving the bankimals—animals that can balloon up with coins like a piggy bank. As the game progresses, the player learns about the fundamentals of using a bank account, in addition to related topics such as the concept of paying taxes. Two downloadable expansions are available with the proceeds going towards the charities SpecialEffect and Young Money.
Source: Wikipedia, "[en.wikipedia.org/wiki/Island_Saver Island Saver]", available under the CC-BY-SA License.