FINALLY got the hard badge. My best advice is stick with a batch of letters you're good with. If you blank out on J's like me, don't use it. Jade letters and a vocabulary full of 1-3 power level letters and a few 4-5 goes a long way.
Bomber trolls and bats are so much more powerful in endless mode. In the campaign you're accustomed to killing them with an arrow or two and suddenly you can't kill them with arrows before they cross the field and have to use magic. I'm curious to know why it's so different, that is, whether you're weaker in endless mode or whether they have significantly more health
I can see it now, Effing Worms: World Domination. Start the worm out small at a playground, then move to bigger and bigger areas (office buildings, towns, cities) so the worm always fits the screen. Then end it with a short scene of the worm eating the Earth.
 "Clockwords: Prelude"){kind=icon}
 "Insectonator: Zombie mode"){kind=icon}
 "MegaDrill"){kind=icon}
 "Granny Strikes Back"){kind=icon}
 "Epic Boss Fighter 2"){kind=icon}
 "The Necronomicon"){kind=icon}
 "Mud and Blood 2"){kind=icon}
 "Sentry Knight"){kind=icon}
 "Arkandian Crusade"){kind=icon}
 "Get Off My Lawn"){kind=icon}
 "5 Differences"){kind=icon}
 "Loved"){kind=icon}
 "Deadly Neighbours"){kind=icon}
 "Effing Worms - Xmas"){kind=icon}