But the app hasn't been doing as great as it could be, according to developer Godzilab -- first, they had some issues with piracy, and now they're saying that the game's just not selling as many copies as they'd hoped.
So the game has gone free -- kind of. You can pick it up right now in the App Store for free, and play ten games without paying a single cent. Once you've played those games, then you have the option to buy the whole app via in-app purchase for $2.99. That's not exactly freemium (it's more of a demo version), but at least players will be able to get a feel for the game and how it works before laying down their three bucks. Personally, I still recommend the game -- I bought it on my own and still enjoy a quick game (even though I usually land in the middle of the rankings). But if you've been waiting for a chance to try it out, definitely take advantage of the new model.