I don't know how to debug this.
May I ask you to send a screenshot of the moment where you are stuck?
Doesnt move at allJeff, according to this page https://docs.unity3d.com/Manual/webgl-debugging.html , if I make a development build you could access some information that is available in the browser console...
Honestly that will take way longer than watching the youtube video of the 3 minutes game.