Three things I learned about game design:
- A little chaos is ok, so long as it's not borne out of confusion.
- The simpler your rules are, the greater freedom you have to explore variety in the expression of those rules (e.g., the many, many different images you have to match against in Loonacy).
- A strong theme is important. We found the Retro deck to be more enjoyable than the normal deck, simply because the theme was 1) cool, and 2) strongly expressed.