The game and so the town up-growing is very well done already, but some things I would enjoy to get it.:

• in the close city view, I would really love to get a hint which building is what, when I hover the mouse over the buildings. I think even old DOS games had already such a service. At least the buildings name, but of course the whole description would be fine.
• there is already an option for "Manual Improvement Placement" which is really great. Just what me confused a while was the fact that I could not always select the position. Of course not, since some buildings are just upgrades of existing ones. Highlighting them would give a hint what just happens!
• I would love to see somewhere a hint how many city defenders are already in the town, didn't find this yet!