Everybody is playing the same track every day. A new track is generated every day. I haven't played today's track but 25 seconds is generally a very good time.
The voice is (should be) whatever you have your computer's TTS set to. That said, the WebGL build doesn't follow that and does a voice that in my computer is also weirdly high pitched. Try the downloaded version and you should hear your TTS voice of choice.
Thanks for playing and commenting. I'm glad you liked it. Although this is the work of only two days, I've been thinking about this and wanting to make it for the longest time. I'm really pleased with how it came out and I do plan to continue to develop it.