I feel like this could have been a lot better. It appears laggy displaying the time line. Why does this operate in small increments rather than be analogous? You can easily interpolate the colors between the previous tick data point and the next tick data point. It would appear so much better if you did. On top of that, it was incredibly unintuitive.

I had no idea what the buttons in the bottom left meant. Why is does the "play" button use a fast forward icon? Why doesn't it turn into a stop or pause icon when it's playing? When I first opened it, there's no indication of why I had to select a gender before I could even type a name. Displaying the input field (it doesn't look truly because it matches the color theme) and the gender button doesn't inform the user what to do at all.

Overall, it's pretty neat but it's a pretty good example of something that looks pretty but is the opposite of usable.