As far as the Zelda game goes, seeing the ladder means that if you don't get out of the cave it's probably the solution. From there you can think of possible ways to interact with the ladder. Given the tools at your disposal trying to shoot it with the bow becomes one thing to try.
As far as closing programs go, the obvious first step is to search a list for open programs. Then you try the various ways you can interact with them. What does swiping do? What does long-clicking do?
In general there no closing applications in Android in the way that exists on Windows. The average user is not supposed to need that functionality. Android applications are supposed to be designed in a way that doesn't need the user to close them.
I am highly resistant to mouse gestures. I prefer to use keyboard combinations for routine tasks.
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