By far the most unique take on the theme, and you have some hilarious dialogue in here. I came out of this knowing so much more about Finnish Municipalities than I would have ever thought, and I learned it from an FVN no less!
Your passion and care for the project comes through in so many little details, this is so far the most polished entry I've read (of the ten or so). Incredibly impressive effort from a solo dev, it looks amazing and your hard work is clear for everyone to see.
The literal expansion of Helsinki into other parts is a good use of theme.
I do agree with Loudo's critique, I was bombarded with Finnish words and names and it made things difficult to digest at times, I would often have to pause or reread sections to understand who or what was being discussed. This is, of course, an issue of not speaking the language or not being from the region and while it slowed me down it didn't diminish my enjoyment of the story at all.
That said, you presented what would otherwise not be (for me) an exciting topic in a way that was ceaselessly engaging, and in spite of a couple slowdowns and hiccups I tore through the whole thing with a smile on my face!
Excellent work!