Great graphics and music (I still got it in my head :D )
For the gameplay, like other people said, you don't really feel what you're doing. You're just clicking on a button and waiting.
Some ideas:
- when you click on a button, the camera place itself top down, when you do the action, it goes back to the initial view
- red light, in the top down view, you have to choose wich red light you want to hack
- Quarantine, in the top down view, you have to choose wich van you want to put in quarantine
- navigation bug, hard to use with this system ^^, may be another power to slow down a van, and this one could be free so you always have something to do
- having a feedback to knwo when a van is going to disappeau (a little timer on it may be ?)