You are free to do whatever you want in the city. Find your car and drive around.
Instructions:
'ARROWS' keys or 'WSAD' keys to drive the vehicle;
'SPACE' key to handbrake;
'C' key to change view (camera);
'Shift' key to boost vehicle;
'R' key to rest scene;
'G' key to rest vehicle;
'F' key to get on/off vehicle;
'Page Up/Down' key to switch gear (manual gear);
Tab to toggle pause