That looks amazing! A ton of stats geeks will no doubt love to dig into their games this way.
I submitted an issue for you in Github, because a custom user-agent string with contact info would be really helpful! It helps us identify which apps are using which parts of the API, and if something goes wrong it's easier to work with you to fix things.
Thank you — excellent work!
Hey all, I just finished up this little app to visualize all of your chess games from chess.com. It provides info on opening frequency and piece counts per move for each game in an easy to digest series of graphs. Hope you give it try and give some feed back on what you would like to see more of! (ps. it might be a tad slow if you have a lot of games > 2000, so you might have to be patient, I'm currently working on improving performance) https://github.com/Bmcgarry194/chessvision
Here is a gif of the app in action: