This is quite well done, nice work! One thing is I was constantly expecting that I could start typing the phrases instead of typing 'enter' first to begin. I think it seems more obvious to just let people hit the first key in the sequence to start the timer. I don't think I'm unique in this but I'm actually a horrible typist 'by the book'.. that is I use my index fingers for probably 75% of my typing. It was interest…
I type a little slower now, and my hands feel pretty much the same, but it makes my computer that much harder for other people to use so I'm calling it a win.
It's actually pretty fascinating, though— I can still type blind with speed in either layout, but the process is completely different. I know the location of an arbitrary key in QWERTY, but I'm not sure I could actually give you the Dvorak layout without putting my hands together. I don't use Dvorak keycaps, which might have something to do with it— on one of my laptops I actually rearranged the keys to be accurate to neither. I don't like it when other people use my computers, and I like that experience to be mutual :)