Hi Andrew,
HTML code generally is no reason for Google to stay away, or to be more interested for that matter. What Google wants is that your site is popular. The more popular, the more interested they will be and the faster they will index.
Popularity comes with back links from other websites. The more the better and if they have a high
PR (PageRank) that helps too.
Of course that leaves you with the question of where to find these back links. The answer is simple, but the implementation is a lot of hard work (unless you have a huge advertising budget).
You can start with directories and link exchanges. There are many
free directories but they´re not always that easy to find. In any way, you need back links in order to get Google more interested.
Regards,
Peter