to kill the turtle you need to attack the head with spells or when you took everything over with an massive army at once. begin from the beginning with the spells and only attack the head.
this game needs a speedup button because battling the same CPU over and over again you get a basic strategy which leaves you bored and waiting for over 5 minutes. 10+ attacks like this take a lot of time so the main pro of this game is completely annihilated.
just a tip for all those badge hunters out there: it's ten times better to log in just a sec couple of times a day ten 30 min in one go. this is especially good against attackers because you take all your res., can't be attacked when online and you immediately repair after an attack making optimal use of your dam. prot. so you can still grow. hope this helps to get the badges and stops the bitching.
the problem with the worker stopping upgrading only happens when another worker picks a shroom. avoid mushrooms when an worker is working on something big, the only options you have after the worker stopped is spending shiney or stop upgrading
tip on last lvl: don't enter the chamber of DOOM from the top but from the bottom. there's a small gap right to the purple booster. use this way also to get out. because you don't have to deal with switching screens it's waaaay easier. hopes it helps saving your nightrest
 "Mardi Gras Mayhem"){kind=icon}
 "Penguin Overlords"){kind=icon}
 "Civilizations Wars"){kind=icon}
 "Ninja Painter"){kind=icon}
 "Backyard Monsters (removed)"){kind=icon}
 "Pillage the Village"){kind=icon}
 "This is the Only Level 3"){kind=icon}
 "Clockwords: Prelude"){kind=icon}
 "Cuboy: Cubeture 2"){kind=icon}
 "Closure"){kind=icon}
 "Accelerator"){kind=icon}
 "SOPA/PIPA"){kind=icon}
 "Amberial"){kind=icon}
 "ESCAPE"){kind=icon}
 "Santa Rockstar: Metal Xmas 3"){kind=icon}
 "Gibbets 3"){kind=icon}