1. Determine what problem you are trying to solve 2. Model a real object 3. Do a few things excellently 4. Reward each touch 5. Don't quiz user 6. Use subtle details to give users clues 7. Spend the time to make a quality prototype
tab bar or segmented control World 1: Dynamic Dozen (pictures) World 2: Links to Ellen's website (thumbnails of destination) World 3: TBD: Recipes or Herb Details
same layout as World 1 Background is consistent but recognizably different Throw to Safari; build own browser; or use open source mini-browser (SVWebViewController, e.g.)