User blog comment:Uselessguy/Guess Levels in the whole series/@comment-25154254-20150105144346/@comment-5792287-20150105150021

Pirate Seas - Day 23.

They'd land on Flowers immediately and trample them, making it unbeatable unless you kill them before they land, or you use Blovers...so not quite impossible, but the only thing I can find that's close enough.