Let the plants shoot bullets toward the wave of zombies which are heading towards them. Play the game with the aim of killing all the dead people with the help of bullets. Aim your bullets towards zombies and kill them all to clear the level. This wave of deadly zombies will keep on rising as you move ahead in the game, so let the pea shooter to angle shots in such manner that it kills 2-3 zombies in one shot.
Kill all the zombies before all the bullet finishes and don’t let zombies rule your area.