"a quantum leap forward in MMO browser games"? Are you kidding me? This is the same formula as used by every other damn browser game. Lame and unoriginal. The only redeeming quality about this game is the nice graphics. That's it.
This was an interesting concept for a game, but it can range from too easy (build towers so enemies can't spawn) to kind of difficult (you keep having to build towers around you and you can't move, worse, once they destroy towers closest to you they get near you and you can't move).
Interesting variation of the typing game. I agree with Tresmius, if you're a fast typer this game is pretty easy. There should be more difficulty settings for the very skilled typists out there.