Roof

The Roof is the roof of your house, of course!

Classified as the 'roof' level by the game, it consists of a 5x5 sloped side in back and a 4x5 straight side in front. Apparently, Crazy Dave dosen't know how the Zombies got on the roof, but at the begining of roof levels you can see a ladder at the right. Some Zombies are much stronger on this stage, any like Gargantuar, Catapult Zombie, Imp (also not strong, but somewhat fast), and at the end of 5-9, Dr. Zomboss leaves a note (in cursive), and at 5-10, there is no fog or pool (of course there's no pool) Dr. Zomboss will be the Final Boss of this game, however, and 5-10 seems like the most appropriate level to fight him

How it affects the game
Normal plants (Peashooters, Repeaters, etc.) will not be able to hit zombies if planted on the sloping side (although they can fire over the edge when planted on the first sloped column), so you will need to use lobbed-shot plants for this stage. You also need Flower Pots to place plants on the roof. Because it takes place during the day, Sun falls from the sky during this stage, and mushrooms fall asleep. Also, before purchasing Roof Cleaners from Crazy Dave, your last line of defense is, unfortunately, your hindmost plants.

New Zombies

 * Gargantuar
 * Catapult Zombie
 * Ladder Zombie
 * Bungee Zombie
 * Imp
 * Boss Fight Dr.Zomboss