Took some time to figure out how to explain it. Here's how to make a mini-game (or any small feature to your game, like that magic map)
1) Have an idea.
2) Write down all the resources you'll need.
3) Figure out how to do the views best.
4) Draw pics and views.
5) Think about the commands you'll need to use in the logic(s). If you can't think of a good command, try looking in the help-file of AGI-Studio.
6) Add the resources.
7) Write the logic.

Test.
9) Polish things up.
It's as simple as that. With this, you can actually make everything that's possible in AGI.
-Kon-Tiki-