The typing tutor works in the sense that it reads my twiddler keyboarding and I can successfully complete literally the first line of the tutor.
It shows absolutely no progress or statistics.
It doesn't allow me to click on lesson key set to move to a different one.
I can click manually with a mouse on the "forward" and "reload" button (why are these so tiny?) but while I'll get a new line of typing it doesn't actually store any progress etc.
Shouldn't Enter or Space advance the lesson?
This is across Android Firefox, Android Chrome, Linux Chrome and Linux Firefox. All exactly the same failure to store any state.
If this was on github and opensource I would have continued to look but it's minified js and I lost interest.