First sea

spawn island [level 0 - 15] [2 quests]

desert island [level 15 - 35] [2 quests]

cursed island [level 35 - 60] [2 quests]

magma island [level 60 - 105] [3 quests]

snow island [level 105 - 165] [4 quests]

forest island [level 165 - 200] [2 quests]

Second sea

rocky islands [level 200 - 260] [3 quests] 

(coming in update 5)