ABOUT ME:
I'm a scientist who writes fantasy and science fiction under various names. This contest seems really fun.
MY SUGGESTION (199 words):
Life is short, even if you live forever.
Fifty years is a long time to wait for the things you ordered. Everybody's eagerly awaiting the arrival of the next transport platform, coming from earth. They don't anticipate it crashing into the ocean. Problematic when it's a habitat as large and massive as one of the seven moons.
Rain. I look down. Dimples reflected in a shallow puddle. We hold each other.
We're safe. Others aren't.
Behind us, behind mist, ruins of a dead city. Flooded.
In the distance, the sound of waves crashing against the far shore.
Were it that the waves were merely their sound!
With the city destroyed, the narrator and five other individuals venture towards danger, not away. They'll not age. But their life absent technology will be a hard one. They must recover, somehow, what they can, from the crashed platform, whose lowest levels rest on the soft ocean floor. Problem? It's slowly sinking.
Another problem. The colonial administrator is with them. She wanted to extort from the shipping guild and first gave wrong coordinates to the platform. Now she has something to hide from the other survivors.
Things that once took hours take years.
Thank you for your valid summary