the game object.</p>

            </div>
            
            <div class="content"><div class='highlight'><pre>    <span class="hljs-keyword">this</span>.shootSound = <span class="hljs-built_in">document</span>.getElementById(<span class="hljs-string">'shoot-sound'</span>);

    <span class="hljs-keyword">var</span> self = <span class="hljs-keyword">this</span>;</pre></div></div>
            
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        <li id="section-12">
            <div class="annotation">
              