Sorry I never published on Google Play OR the App Store.
What do you mean by 'test'? The game is public now isn't it? You should probably test the game on another platform like the Scirra Arcade or host it. So people can play and test. Then publish on Play.
Anyway, I still think the graphics could use an overhaul. For example; some graphics are drawn with 1x1 pixels and others are much larger, more like 6x6 or bigger. The graphics just looks out of proportion and I'd make it look more .. uniform. Also, the text displayed isn't a pixel font either.
Maybe that's just me being a perfectionist, although I do think if you want to compete with the 'big boys' you will need to update them.