A sizeable setting with an extensive mission for players to sink their teeth into and spend few days to discover the truth of this sea.
+ Large but direct list of objectives for players to complete, making progress feel steady
+ Lots of details on how time progresses and what consequences player actions can cause.
+ Plenty of tools and equipment for players to thematically explore the sea floor and repair the platform
If you're looking for feedback, let me know and I can expand further.