This is just lovely. I love relaxing games that still require your brains on and challenge you to do decisions (rather than hectic clicks).
The music is just perfect. Some "siblings" would be nice to give you more musical variations.
I _love_ games that have small play fields - the best are ones where you don't even need scrollbars or zoom. Just perfect. Then will interesting constraints or scoring - nice!
However: Some scoring relations were unclear. It is not clear if parks next to houses actually make the houses better. Also: more houses next to markets -> better for the market? Or: what does that with the houses - make them better or what? Such calculations and relationships should be clearer.
Otherwise: I have Steam games silimar to that. So: made you should consider polishing and publishing it! :-)