OP here. One interesting thing about FOCAL is that * has higher precedence than /. So in Lunar Lander, M*G/Z*K is what mathematicians and other languages would write M*G/(Z*K). I did a double take when I first saw that. :) As the Wikipedia article says, "This can cause subtle errors when converting FOCAL source code to other systems."
Also, the IF syntax is a little limiting and hard to read, although I suppose programmers would get used to it.
Also, the IF syntax is a little limiting and hard to read, although I suppose programmers would get used to it.