Interactive D3 tutorial

I just started to look through the slides and they look really cool. However, only on 80% zoom can I actually see the "run" button at the bottom. It would be great if you could fix this :)

Methinks these slides go with this here video <a href="http://www.youtube.com/watch?v=RXhucjpsNqA&#38;list=PL44F9AB47F30B1402&#38;index=2" rel="nofollow">http://www.youtube.com/watch?v=RXhucjpsNqA&#38;list=PL44F9AB...</a>

These slides from this course at Stanford -<p><a href="https://graphics.stanford.edu/wikis/cs448b-12-fall/" rel="nofollow">https://graphics.stanford.edu/wikis/cs448b-12-fall/</a><p>There has been some HN discussion on it in the past<p><a href="http://news.ycombinator.com/item?id=4927858" rel="nofollow">http://news.ycombinator.com/item?id=4927858</a>

All I get is huge text "D3", "Data Driven Documents", Github repo link and metainfo. Maybe it is broken in Opera?

This could use a little notice to use your arrow keys as navigation.