Your city is under attack from aliens (ufo), it's up to you to defend it for as long as you can. addictive survival game, very fun! - instructions and controls: use your mouse to aim at and shoot the ufos (unidentified flying objects). when the flying objects shoot at you, you can disable their shot by aiming your cross-hair on the shot itself, and pressing space when things get hectic, use your limited bombs by pressing b.
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