I do actually provide that- try clicking the help button! I wanted to make it so clicking on buildings in the queue would remind you of the synergies but I didn't have time. The "strategic arson" mechanic was also me trying to give players more agency.
I love the idea of unlockable buildings! That would be a great reward for higher scores. This definitely isn't a true city sim, i had to scrap a lot of ideas about events happening and little people walking around. It's honestly more a puzzle game with city flavor.