J-Sound: reading keyboard shortcut in vocab pages

The lesson and review pages have a shortcut (“j”) to play the reading.
But the vocab pages do not have such a shortcut.
I always wanted to try and create something with tampermonkey.
And so I created J-Sound: https://greasyfork.org/en/scripts/18388-j-sound

The usefulness of this is pretty limited but I just wanted to try and see If I could get it to work.
I tested it with tampermonkey and chrome.