It's a cool challenge! I tried it at 90wpm and cleared most words. Some I had to do 2 or 3 times to do fast enough. Then I hit my nemesis: I can't type "necessary" fast enough for 90wpm. Tried it 20 times.
1. That was very enlightening
2. I added skipping a word by using the [Esc] key
It would be interesting to see if one could safe those words for later and practise just those.