What's Game Design?
Rather than lecture or force you to read about what game design is all about, nothing beats playing a game to teach you about it! If you find it difficult to play this right now (due to flash/browser issues, time contraints, work firewalls, etc) then feel free to skip it for now and come back to it later Nothing in this system is a "prerequisite"!
Mission - Play GameStar Mechanic
Once you've played a bit of GameStar Mechanic (or preferably beaten it, its not very long!) your next step is to learn an important aspects of the trade, Pretotyping and Prototyping.
Mission - Learn about Pretotyping and Prototyping
Learn some toolsNow that you've tried your hand at working with the flexibility of physical components and imaginary rule systems it's time to put together a kit for you to use whenever you want to test out an idea or remix.
Mission - Assemble a Pre/Pro-totyping kit
Mission - Remix an analog game
With a good understanding of how to start testing out your game design ideas you should get familiar with a Prototying tool, the better you know it, the quicker you can test your ideas!
Mission - Try out a Prototyping tool