Sabertooth, the main point of it is that because it has no game, it doesn't lag you out if you wanna, like me, do stuff in other tabs and chat as well.
15k civilians, 8 cops, 20 v. fast zombies, infection time 1 second. --- By 3 minutes: 6 cops. 10k civilians. 5k zombies. --- By 5 minutes: 5 cops. 6k civilians. 9k zombies. --- By 6 minutes 30 seconds: 1 cop. 3.5k civilians. 11.5k zombies. 100 dead. --- By 7 mins 30 seconds: Still 1 cop, still 100 dead. 1.5k civilians. 13.5k zombies. --- Total Zombie Takeover at 8:43 with 14,921 zombies. 14,901 more than at the start. >.>
Perhaps the gravity is pre-defined in whatever direction. Your mouse has a somewhat weaker gravity, it slows it down when closer. It doesn't push it away, that's the ball being pulled by the said pre-defined gravity when out of range of yours. :O
 "Just Chatting"){kind=icon}
 "How fast can you click?"){kind=icon}
 "Zombie Outbreak Simulator"){kind=icon}
 "Robot Wants Kitty"){kind=icon}
 "The Conduct Quiz!"){kind=icon}
 "When Worlds Collide"){kind=icon}
 "Gravity Mouse 2"){kind=icon}
 "Infectonator : World Dominator"){kind=icon}
 "Particles"){kind=icon}