I'll promote and post your app or game on my popular android blog.
I've been running my blog for the past
two years. I write reviews about Android apps, games and other technology events.
For a 5$ I'll post a review of your app on my blog, which you will provide, for one whole week on the first page !
My blog has a unique traffic of around 1000 per day so your post will be visible to a lot of people.