I like the concept of this a lot, but typing the words over and over again got tedious after a while (though I do love the sounds typing makes---so satisfying!). I couldn't do any of the challenges, even with the slider set to max; I normally type at around 100 WPM but even that wasn't fast enough, especially with having to move my hand from the mouse back to the keyboard to start. I wonder if it's a bug that they're so fast, as when I first tried them at the default setting, the very first challenge had less than a second on the timer. I tried the downloadable version to see if it would be any different, but the resolution seemed to be set wrong and I could only see a quarter of the game. Overall, good work on this. It just needs a little polishing up, I think!