Yes, marketing/publishing a game is definitely a different skill then making one. It's a skill I should have started working on long before I finished the game.
Thanks for the suggestion about updates. I do plan to make one or two more significant updates before deciding whether to move onto something new.
I would push quality/content updates to the game so there's fewer reasons for bad ratings, and each update represents a news item someone might blog about so you can push for press every time. If you still fail to get any downloads at least you will improve the product and maybe you can attract a publisher.