I agree; the author has obviously worked hard on the game. The guide is well-written and logical. It's not correct in all respects, though. For instance, when talking about builders gaining skills, s/he refers to getting them to examine/fix the huts. In fact, builders only gain skills through 'fixing' the huts; 'examining' the huts confers no extra skill.

The third type of mushroom must be VERY VERY rare, though, since no-one has ever reported in the forum its appearance in their game!