more photos

Edit your CSS to include (wpinstagram.css)

display: inline;
float: left;

Under

ul.wpinstagram, ul.wpinstagram li, ul.wpinstagram li a, ul.wpinstagram li a img {
	margin: 0 !important;
	padding: 0 !important;
	border: 0 !important;

Then edit your PHP (wpinstagram.php)
Look for:
echo '<ul class="'.$cls .'" style="width: '.$imagesize.'px; height: '.$imagesize.'px;">';

Initially the open and close

is outside the foreach.

Change it like so

foreach($images as $image):
					$imagesrc = $image[$imagetype];
									echo '<ul class="'.$cls .'" style="width: '.$imagesize.'px; height: '.$imagesize.'px;">';

					echo '<li><a href="http://ink361.com/p/'.$image['id'].'" data-user-url="http://ink361.com/#/photo/'.$image['id'].'" data-original="'.$image['image_large'].'" title="'.$image['title'].'" rel="'.$this->id.'" data-onclick="http://plugin.ink361.com/photo.html?id='.$image['id'].'">';
					echo '<img src="'.$imagesrc.'" alt="'.$image['title'].'" width="'.$imagesize.'" height="'.$imagesize.'" />';
					echo '</a></li>';
									echo '</ul>';
				endforeach;

That will show a grid of images.