There are many rules to designing games. Above all, there are two game-design rules that control all others. First, and most important is:
Keep It Simple.
The second rule is nearly as important but is a bit more complex in its use. The second rule is:
Plagiarism is a dramatic way of saying, "Use available techniques." If you try to plow too much new ground, you're not going to get very far, and you will have an extremely difficult time in keeping your game sufficiently simple to be manageable.
-- James F. Dunnigan, The Complete Wargames Handbook (Revised Edition, 1992), p. 114
Offered not because I necessarily agree or disagree, but to spark thought and discussion.