I know the game is a little ways from release even in beta but I've been doing marketing for my upcoming game since I'm releasing in a few weeks and have come across some great sites I think would help push players this way.
Gamejolt.com really has a great following and even gives cash and what not for people playing your game.
Indiedb is another good place to post
Anyways these are just a few I can think of that are a bit diff from the norm. As I run into more I'll try to post.