Used to be a fun time killer. Just re-downloaded it to find out that they now stop the game in the middle for an unskippable ad. I normally don't complain about ads in a free game because it's free and that's how they make money. But this makes the game horrible. A 30 second ad every minute of play time, then another ad after the game. At least 50% of the time is now an ad. That's excessive.