G'day, nice simple and quick plugin, thanks!
I notice it isn't caching posts/pages with "wp-" in their name. This is because of the following code in cache.php:
// Do not cache WP pages, even if those calls typically don't go throught this script if (strpos($hyper_uri, '/wp-') !== false) return false;
Would it be possible for you to change this test to better match the WP folders? e.g.
// Do not cache WP pages, even if those calls typically don't go through this script if (preg_match('@/wp-(?:admin|content|includes)/@', $hyper_uri)) return false;