How could Sentient City be better? Your note goes straight to the developer.
One city, one map. Climb any building, buy shops and watch the locals come shopping, drive taxi fares, duck into doorways to hide, and see how long you last at five stars.
Shared world: everyone on this server plays in the same city. Needs a keyboard and mouse. Your cash, shops, guns and position are saved in this browser; in the real game the server keeps them.