Use A,S,D,W to move or the arrow keys. There are 150 levels of zombies charging at you and the higher level you are the zombies health and damage increases also there could different types of zombies added. There is a boss every 10 levels which is extremely hard to beat but possible so don't give up if you are on a level that has a boss. There are half a dozen of upgrades you can select which uses money from what you have (You earn money from killing zombies)
YAY MORE MEMOOOOS
