But if you've never seen it, here's a funny viral video that shows the game in action, and also how to "cheat" and beat it.
The game has become the subject of controversy the past few days. It had suddenly become so popular it was reportedly making the developer $50,000 per day via ads, developer Dong Nguyen tells The Verge. That's a dream come true for most game developers.
But in this case, addicted gamers were frustrated by how hard it was, and that there didn't seem to be any way to "win" it. Game sites were ripping it apart. A blogger accused the developer of tricking the app stores to get the app higher rankings. Crazy, hoax stories of people committing violence over high-score envy started circulating on the Internet.
So Nguyen shocked the tech world when he tweeted "I cannot take this anymore" and pulled the app from the game store. Those who have already downloaded the app can still play it on their phones.
What's all the fuss about? This viral video shows you: