I wrote this to you before. Do you remember? I finished the game at 97 percent. It is now at 79 percent.
Viewing post in Z-Island UnrealEngine5 Demo comments
If all quests are labeled "END OF DEMO" then you reach the end of the DEMO, only main version gets updates, so you should check on main game version: https://gamingtalesstudio.itch.io/z-island