The zombies are chasing your mouse. Escape! The zombies will die from overcrowding, but the number of zombies "vanquished" will determine your score. I at first wanted to add other features, but it is very fun as is!
Since it's kinda bland anything you comment (within reason) I will add. I want to improve my coding skills and this would be a good way to do so. So let's get commenting and make a fire game team!!! (Does anyone wanna know how overpopulation works? I can explain it...)