Really great idea. Enjoyed playing it.
One thing I would have liked is some kind of indicator if we made a mistake. I didn't know if I should backspace, or space is also a character do I need to type? And one major improvement would be the speed of the run could be maintained until the next word is fully revealed. The runner slows down before the next phrase is fully revealed. So she is always slowing down regardless of our input.
Anyone who likes touch typing will surely enjoy this game loads. Great idea and great work. kudos :D