Totally Nuts

Totally Nuts is the fourth level of I, Zombie. In order for it to be played, Adventure Mode must be complete.

Plants
There are twenty plants in this level.
 * Seven Sunflowers
 * Two Fume-shrooms (always the left two columns in the third row)
 * Four Peashooters
 * Two Snow Peas
 * Five Wall-nuts (always the column closest to the red line)

Zombies

 * Zombie (50 Sun)
 * Buckethead Zombie (125 Sun)
 * Ladder Zombie (150 Sun)

Strategy
Use Ladder Zombies to to climb over the Wall-nuts. They also are immune to the Snow Pea's freezing effect when still holding their ladders, so use them there too. A single Ladder Zombie can also survive in a row with a single Peashooter or Snow Pea (if it's placed directly next to the Wall-nuts), even without its ladder. Since the Ladder Zombie's shield doesn't protect it from the Fume-shroom's fumes, use Buckethead Zombies instead where they appear.

Trivia

 * This level is the first I, Zombie level in which the Ladder Zombie can be used.