Let people know when you have done a major update like new levels to your games in the forum. I have my Pinball Sandbox in the top games and it bounces around a little but I use my own website and social networks to promote it and I use the forum to announce any major updates like the new Simpson's theme pinball layout I just added.
Don't be afraid to ask your friends to play and leave a rating. If a game doesn't get high ratings at first it usually ends up buried never to be noticed again. Once it has some good ratings more people will play and rate it.
See how that works
Thank you for your feedback. I have some higher aspirations for the game, and am currently working with a number of people on Fiverr for everything from sprites to voice acting. Once I have the game polished and looking really nice I plan to upload that version as a new game. Then I probably won't update the version on Scirra except for bug fixes. I will be sure to take your advice when I upload the games final Scirra Arcade version.