@Mallory thanks for the advice! I will try and alter the balance if I can, though I won't be able to for at least 10 hours... so if anyone else wants to have a go in the meantime, go for it!
I love it! The only thing I would say is that the music can be a bit distracting. I think the volume could be lowered a notch so it's easier to hear Gary. But great job!