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    <p>Well this looks like a fun project so it got me curious and I started to look around. I found an article on Quirksmode that talks about using keycode vs character code. I see that you are detecting both upper and lower case letters. The following blurb seems to indicate that this is unnecessary. This article also has important docs on browser compatibility and special key compatibility between browsers and systems. For instance, the command button on a Mac keyboard. What is it? How is it detected and behaves in various browsers?</p> <blockquote> <p>for instance, a lower case 'a' and an upper case 'A' have the same keyCode, because the user presses the same key, but a different charCode because the resulting character is different.</p> </blockquote> <p><a href="http://www.quirksmode.org/js/keys.html" rel="nofollow noreferrer">http://www.quirksmode.org/js/keys.html</a></p> <p>So then the question becomes, how do you detect multiple key presses. I found this SO answer on it that is remarkably simple and straightforward. </p> <p><a href="https://stackoverflow.com/questions/4954403/can-jquery-keypress-detect-more-than-one-key-at-the-same-time">Can jQuery .keypress() detect more than one key at the same time?</a></p> <pre><code>var keys = {}; $(document).keydown(function (e) { keys[e.which] = true; }); $(document).keyup(function (e) { delete keys[e.which]; }) </code></pre> <p><strong>Update</strong></p> <p>Basically I just brought in the code from above, deleted your diagonal code and iterated over the keys array for all movement operations.</p> <p><a href="http://jsfiddle.net/mrtsherman/8NW2K/3/" rel="nofollow noreferrer">http://jsfiddle.net/mrtsherman/8NW2K/3/</a></p>
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    1. COOh, in case it isn't obvious, what I expect you would do is keep all currently pressed keys in the keys array. Then iterate over the array and calculate a move event for each one. I guess technically you could do weird stuff like press up and down simultaneously, resulting in no movement.
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    2. COUpdated Fiddle with an example.
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    3. COAh, that works! Thank you! I'll probably need to tweak it around a little to make things smoother somehow, but this definitely gets the ball rolling a bit more! I'll wait and see if there are any other answers given with other solutions before I jumped in a mark as top, but this is very appreciated!
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