I just published my third game to android, its called Rope Skip: https://play.google.com/store/apps/details?id=com.EqualGames.RopeSkip
Im not the only one who would like to know free methods to advertise for your game.
One of the websites you can use, is youtube. I got that on checked. Is there other websites where you can adverties for your game?
Hi,
There is no effective way to advertise your app for free. YouTube is great, however there are chances that no one will not watch your video.
Blogging is also a good way. Surprisingly, your blog can be noticed. I would advice you to start with WordPress platform, which is free but with limited features.
Hope this gives you some idea!
Cheers! 
A lot to digest. Lots of work to do 
http://gamedevelopment.tutsplus.com/articles/promoting-your-indie-game-checklist–gamedev-7560
http://www.pocketgamer.co.uk/r/iPod/Pocket+Gamer/news.asp?c=37931
http://www.vitispr.com/blog/free-press-release-sites/
http://www.gamasutra.com/blogs/TanyaShort/20131010/201752/50_Easy_Steps_to_Indie_Success.php
Good Luck with your game.
Let us know how it goes!
Balls, there are lots of effective ways to advertise your game for free.
http://devmag.org.za/2009/06/16/zero-budget-indie-marketing-guide/