My bad! I thought there wasn't any, but I just revisited and of course you have check boxes for sound on the start page. I suppose I missed it because I didn't expect the option there. When i played I went straight to the how t play and then start after that. The audio itself is nice also, nothing wrong with the quality or anything like that, in which case I guess my only criticism of the sound would be that it should be on by default, with the option to toggle it off, rather than off by default. Even then, I doubt it would have bothered me much had I noticed the (glaringly obvious) check boxes to begin with.