Lovely. Smart, interesting, charming, pleasant. Would be nice if I could save a game half-way through; it takes a while to get to the higher levels, and I don't always want to keep going.
I like the game. Fun! Many hours spent. If they had a Linux version, I'd even buy it. But why do I have to abandon everything? I built a nice network and got the creeper under control; it's weird to just junk it all.
To make this easier, when you have to guess, guess in English letter frequency order. I start out with E T A O I N S H R L D U, stopping when I have enough letters to start guessing based on the word.