A note. If you cannot defeat an enemy within the time limit (I believe it to be 35 seconds), it resets. Lower the stage if you are unable to deal enough DPS to defeat an enemy.
There is a large difficulty spike when it comes to the central islands. One main thing is the boss, being twenty levels above all the others, is surprisingly relatively easy to beat. I figured I would scout and fight the frost giant to quell rebellion, but I actually managed to defeat him winning with about 2000/8000 health left. The central islands are still rather difficult, though.
Protip: Highly suggested that you have Barrier and Protect up for all major boss fights. Especially last boss, Spirit Bomb will wipe you out easily if your Barrier is fading, so remember to buff and defend.
You don't start out with a weapon, and enemy's can attack way too fast. This makes the start of the game terrible, you can't battle enemy's with minimal damage.
The tutorial will get you some starting gear but I will make sure to just hand it out in the start in the next update, if you block you can time attacks to get past their fast attacking
 "Mine Blocks"){kind=icon}
 "Words Warriors"){kind=icon}
 "Idle Raiders"){kind=icon}
 "Slim World"){kind=icon}
 "Frozen Islands"){kind=icon}
 "Reactance"){kind=icon}
 "Family Rush"){kind=icon}
 "Kana Warrior / かなウォリアー"){kind=icon}
 "The Empty Kingdom"){kind=icon}
 "Epic Combo!"){kind=icon}
 "Voice from the Sea"){kind=icon}
 "Man in Gap"){kind=icon}
 "Castaway"){kind=icon}
 "Upgrade Complete 2"){kind=icon}
 "Epic Battle Fantasy"){kind=icon}
 "Elventales: The Arcanery"){kind=icon}
 "Clicker Heroes"){kind=icon}
 "Steve's Vengeance"){kind=icon}
The tutorial will get you some starting gear but I will make sure to just hand it out in the start in the next update, if you block you can time attacks to get past their fast attacking