The smoothness of this game is what charms me every time. World 1 and 2 are overly easy, but I maintain that I are fun to play through at light speed. 4/5.
Much too easy becomes unfortunate when too enemies go under each other, you mistype, and you can't find what you're typing. But good. Helpful for bad typists. 3/5
I like it. Originality is overrated anyway, guys (look at desktop Tower Defense). Fun, feats are challenging and well placed. Dying in one hit is kinda lame, though. 5/5 anyway.
The hard badge won't take too long, as I've seen some complain about it. The anvil racks up antagonist points fast. Well constructed game. Not as good as Defend Your castle though. 4/5.
Another good "game" for the series. As I've said on the first, interactive and educational is good for all you arses who don't know what you put where.