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The aim of the game is to find the major city shown at the bottom of the screen. It's latitude and longitude are also shown for educational purposes. A score is also shown which is incremented each time a user hits a location. To successfully hit a location, the user must hover the centre of their screen over the circle and/or marker that is displayed at that locations' latitude and longitude. If a user successfully hits the location, the device will vibrate, giving physical feedback to the user, as well as updating the score.  This system is very effective, fun and captivating in its use, and demonstrates the advanced capabilities of using the Android system and it's vast array of sensors to develop intriguing new apps which interface with their users in an entirely different way.