Looks cool, seems like a perfect mobile game as well. I've got it on my wishlist already. Hopefully it takes off, though I don't actually have experience launching a game, I'd worry how it would stand out in the mass amounts of indie games.
The mobile market system seems almost classist, where only the successful can afford to pay for ads for games that are ultimately manufactured and mediocre, but that's one big digression. On Steam it only seems like you need to make a high quality game with a trailer that's eye-catching enough to be successful.