The game is to protect the Earth from enemies.
Through the entire game, only to protect the Land of 600 seconds (10 minutes).
If the land health reaches 0, then an explosion .. And play the game to start again ... Game there are 6 enemy types, 4 spacecraft, and two asteroids.
Each asteroid being removed from his knee get +5 health.
This will help to better protect the Earth.
Control arrows and shoot - space.
Good luck ...

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