I liked your game. It was simple, yet fun and addictive. I think it might need some sounds like sirens, horns, and possibly a crash sound when the ambulance hits a car. Anyway, those are simply suggestions, I really enjoyed the game. Nice job.
Okay in your scenario folder, there is a folder called 'sounds'. Put your sounds in that folder and then in your code write Greenfoot.playSound("crash.wav"); or whatever your sound file is called. I made a fast test scenario for this, and my world code look something like this:
public int playSound = 0;
public void act()
{
playSound++;
if (playSound > 100)
{
Greenfoot.playSound("test.wav");
playSound = 0;
}
}
2012/8/9
2012/8/9
2012/8/9