User blog comment:Drek'TharSuperSword/My Plants vs. Zombies Challenge/@comment-5797509-20130328181328/@comment-5079138-20130329023607

12 Use spawn hack tool. Or play survival endless.

13 and 14 is easy in Last Stand. 13 only spends 2000 suns (no need to complete the level. 14 is same, spends all sun in last stand. No need to complete the level)