Ah... I'll confess that I didn't manage to pick out a "glowworm" sound from the music that plays in that area.
I'll give it another shot then, I think!
Thank you for the hint! ^_^
[edit]
Ah, I've caught the glowworms now, thanks to your hint! ^_^
That said, I was somewhat surprised by the accompanying sound this time--I'm not sure that it actually played on my previous run of the game. If it didn't, then that may be (part of) the reason that I didn't succeed on that occasion.
[edit 2]
And done!
That was overall a pleasant experience, and I did rather like your use of sound in it. ^_^