Amazing game. I did not expect something like this. Everything worked well, very nice tutorial, big number of different calls. Really great job, especially for solo deving. My only issues would be visuals, some actual cars and buildings would be nice, maybe more visible calls, I missed one I didn't even notice and the peace in city was influenced very little when I didn't do something so maybe changing that to increase the pressure. Other than that I would just add things like upgrades to units, different situations.
Really great job.