Kill as many Unidentified flying objects as you can.
The game has 20 levels.
You get a new spaceship every 5000 points.
Blue ufo needs 2 shoots to kill it.
Yellow ufo needs 4 shoots to kill it, but it will give you a shield for a limited time.
Green and Red ufos only need 1 shoot.
If you find any bug, please send an email to firstname.lastname@example.org in order to correct it.
If you have any suggestion, please send an email to email@example.com in order to implement it.
twitter -> http://www.google.com/url?q=https://twitter.com/#!/paco_salazar_tw
Tags: ufo revenge
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