How can I represent pages that are game levels in Schema.org?
<p>I'd like to add Schema.org (with Microdata) to a browser-based game. The entire website would be considered a <a href="http://schema.org/VideoGame" rel="nofollow">VideoGame</a>, so it seems appropriate to mark up each page as a <code>VideoGame</code> in the <code>&lt;html&gt;</code> tag and label the "Home" link with <code>sameAs</code> property.</p>

<p>However, there are individual pages for each puzzle level (each "system"), as well as pages for collections of levels ("clusters"). How do I mark these up? <code>gameLocation</code> and <code>gameItem</code> are both vaguely equivalent properties, but are not good matches. I would love to be able to make each System and Cluster its own item instead of just a property of the parent <code>VideoGame</code>.</p>

<p>How do I represent individual levels of a game on each level's page?</p>