No problem. If you want to play only a single sound you can use Greenfoot.playSound("soundfile.wav"); , too. With GreenfootSound you are able to play music in loops, too.

You can play every MP3, WAV and some other Sound files with it. GreenfootSound sound = new GreenfootSound("Your_Sound_File.MP3"); sound.play(); You have to place the music/sound files into the sounds folder in the project.

public void turnToMouse(){ MouseInfo m = Greenfoot.getMouseInfo(); turnTowards(m.getX(), m.getY()); double r = getRotation()/45; int rI = (int) r; if(r-rI>0.5) rI++; setRotation(rI); } Did you make it that way? }