Thought I'd go big and try to make an RPG using what we've learned. I think it turned out okay.
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images
README.txt
RPG.css
RPG.js
index.html
normalize.css

README.txt

Placeholder text styling from: 
http://css-tricks.com/snippets/css/style-placeholder-text/

I used this page for reference: 
http://stackoverflow.com/questions/48239/getting-the-id-of-the-element-that-fired-an-event

This page helped me fix a bug that was causing the run/fight events to happen multiple times:
http://stackoverflow.com/questions/3070400/jquery-button-click-event-is-triggered-twice

Background image from:
http://upload.wikimedia.org/wikipedia/commons/d/d3/Homo_floresiensis_cave.jpg

Character and treasure clip art from google image searches. Resized by me.

Known bugs:
Only tested on chrome on a mac, probably some CSS weirdness in other browsers/platforms.
I don't test the name input for anything other than existence, so I suppose it could break the script in some way.
Footer doesn't show when you zoom real hard.

Features I wanted, but haven't completed (yet):
Use the arrow keys to move.
Put a character in the dungeon instead of "You."
More complex fighting system.
More styling of drop down menus (apparently not possible)