Thanks, I guess it was just a programming error instead of some obscure homage to a game I never played.
Another question: I've read the beginners guides, authored by Thomas and Sylph IIRC, and they've helped me alot... but I feel I must graduate to Nightmare! difficulty. I say this because I tried it, and find it MUCH more fun than the other difficulties, but I also find it excruciatingly hard. However, I heard that new strategies are required to become good at Nightmare! and I was wondering... are there any guides dedicated exclusively to helping a player get into playing by Nightmare! rules?