[DDickson]

Slides.com is focused on the presentation. The audience is not typically interacting directly with the deck.

When you create a deck, there is a pretty good tutorial explaining how the interface works, including what spacebar and escape do.

The real advantage of the service, for me, is the support for embedding any digital media you want into a slide via iFrames, and the ability to use your phone/tablet to advanced slides and see speakers notes if your venue did not provide you with a clicker.

It also has another pretty neat feature where audience members can pull up the presentation on their laptops/tablets to follow along, and their slides will automatically advance to match my progress through the deck.

I'm just trying to explain why its very much a tool for the presenter, not the presentee.

Edit: Slides.com is a locked down instance of reveal.js

Here is a link to their deck, explaining all of its features http://lab.hakim.se/reveal-js/#/