There are 3 different gamemodes: Day, Night and Bowling. And 9 different plants: Peashooter, Sunflower, Cherry bomb, Wall-nut, Repeater, Puff-shroom, Sun-shroom, Wall-shroom and Double-shroom. On Bowling Game-mode, You have Wall-nut and Explod-o-nut. It has endless mode, too!
