User blog comment:Milesprower2/I, Zombie Challenges/@comment-5797509-20130221013225/@comment-5792287-20130221084242

2: is possible, some Screen Door Zombies move faster than others and CAN make it over Spikeweed,

4: send in three common Zombies in a weakly defended row and they'll eat the wall-nut easily. Repeat with Bucketheads or other Common Zombies in other rows.

5: Balloonists are practically useless in Dead Zeppelin, because in most rows without a Cactus, a Buckethead would make it through as long as you've got rid of the Magnet-shroom.

7: Isn't too bad. Trust me.