Virus Wars

Viruses are invading the system, and you can't let it happen! You'll have to place protection towers to don't let them move. They mustn't reach the end of the track, if they do it, you'll lose points. And if you lose all the points, end of the game! Accumulate a lot of money to buy better towers, when you are ready let the waves of virus enter. Also, you can change the game speed.