If you see a bright light, duck and cover!
I should point out that this story can be very long assuming you're not dying. Years pass and your surroundings will most likely change. You may very well live a life time in the story if you're lucky. You will also experience a completely different adventure depending on how you escaped the initial nuclear strike. (Assuming you do survive it.)
As with any of my writings, the "story" comes before the "game". However, this story was written in a "game like" format. So while there isn't a complex inventory and all of that, you can technically "win" by getting one of the 4 special endings. (You'll know if you get one because you'll get an epilogue)