Releasing your game is certainly exciting, but it's not the end of your development. The most important thing you must do is market your game. Whether through Facebook, Twitter, Instagram, or even YouTube, spreading the word about your game is very important, or else it will get lost in the deep sea of other titles.
Send out posts, tweets, and videos about your great game; let everyone know! Advertising on these social websites is a fantastic way to spread the word as well. I advertised a trailer for my latest game SpaceRoads, and in one day, I got over 7000 views on YouTube. Facebook is another great advertising source, as there are millions of active users, and with these, you can target specific interests, ages, and genders who you believe will be interested in your game.
In one Facebook campaign that I ran for a week, I saw a huge surge in likes and purchases of my apps.
I've seen too many times a game get released where the developer doesn...