Pretty tough for hunt-and-peckers like me; I couldn't get past 100 or so. I don't have much feedback on the actual gameplay, but I will say that I think the menu/front end presentation could have used a little more work, or just been omitted entirely? It doesn't quite measure up to the quality of the in-game stuff and it's not doing anything vital, so the game might have been better off just diving straight in.
But overall it's a neat spin on typing games with pretty stylish presentation; I enjoyed it!