You can now change the volume of the audio from any scene in the game. There's a large "Settings" button on the title screen and a small button in the top right corner of the screen everywhere else in the game. The sound settings will be saved locally so if you come back to play the game another time it will remember your settings.

Also changed the scene transitions so that the music from one scene is faded out whilst the music for the new scene is fading in. Just a little thing that you won't really notice, but it was a bit jarring before!