to enjoy thiis game, i have to read all this!
The sun has been cooking your world. At first, the changes were subtle. Those changes have accumulated into in inescapable new world. The water temperature is uncomfortable and continues to rise. The bounties of food offered by the ocean have dwindled and are now scarce. Your neighbors would once help you find food, throw you a happy wag of their fin, or stay out of your way if nothing else. Their eyes are now filled with hunger. Their eyes are upon you. It is time to go. Surely there must be a better land out there. Now only if you can find your way there.
Thankfully, the sun that is cooking and changing your world has also imbued you with extra-ordinary skills. You can continue to improve these skills and learn new ones. You'll have to, as this new ocean world of your is unrelenting.