I loaded it up today to check out the sound. I also watched a video of the MSX version. I think maybe the helicopter sound in mine is a bit loud - would it help if I turned the volume of it down slightly? I wasn't impressed by the sounds on the MSX version at all - the helicopter sounded more like a steam train to me and when the dynamite sticks disappear it sounds like someone is shooting them! I do love 2600 sounds though.