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You are looking for Google Maps Pacman April Fools.
PacMap is an application that turns your neighborhood into a real-life Pac-Man game.
PacMap overlays yellow pac-dots on top of a Google Map of your location. Your goal is to walk your neighborhood gobbling up the dots whilst avoiding the familiar Pac-Man enemies.
You score points by eating the yellow pac-dots and lose the game if an enemy manages to capture you. You can adjust the difficulty level of the game and you can also set the time limit to 10, 15 or 20 minutes.
PacMap includes a couple of options that can help to save your battery life and data usage. If you disable the animation option your battery drains less quickly and if you switch from the default satellite view to map view you will decrease data usasage.
PacMap is available from the Android Market.