Flu Aliens 4

Alien flu was stopped, all but one virus made it. But this virus is able to copy itself and is not going to give up. Will the nano machines be able to fight this new enemy? Mouse Every 100 exp you gain a level Gold, Point and Exp will go up as you level But also the enemies will become harder

Mouse nEvery 100 exp you gain a levelnGold, Point and Exp will go up as you levelnBut also the enemies will become harder