Thank you for trying it out. You would also have missed the names of the animals being spoken when you found them. What OS/browser are you using to play it? I'm not sure I'll be able to fix it, but it is worth a try.
I've just tried it on a bunch of browsers on both linux and windows.
The narration doesn't work with any browser on my linux machine, and it doesn't work with firefox on my windows machine.
Just got it working by installing chrome on my windows pc though.
Hearing your time and how many animals you caught makes a huge difference haha