Feedback Appreciated! A coordinate trainer app for Chess players

This is my first project using HTML, CSS, and JavaScript. Let me know your thoughts!

Would be great to know if anyone experiences the following:

  1. Audio lag after starting the game.
  2. Post game text overflows it’s container.

I’ve had some issues making it responsive for larger monitors so if anyone is using a large desktop screen and can feedback on this it would be greatly appreciated.

Also any feedback from a UX perspective would be well received.

For a detailed look:

For a quick look: