I have played this game daily for years, recently it stopped giving credit for finished puzzles, then it started freezing on me, usually at the end of a game, but last week it started freezing the screen in the middle of game, a few times I uninstalled and installed it again, but it was still a frozen game and no way to fix it without the developers wanting personal info from me. I always played offline, so there were no ads, but ads would still try to play. Uninstalled for good today.

Update: They change some rules/reqs mid-game now & it's awful. If they don't end that, I'm done. I like this game. BUT, the ads can be VERY aggressive. I get exchanging ads for coins/points. However, there are some ads that display an "X" making you believe you can get out of it but trying to hit the "X" sometimes either takes you to Google play to download the advertised app or the "X" does nothing. It is very misleading. I've not been able to get out of some ads, even after several minutes.

Unplayable ½ the time. Freezes up constantly, lags regardless of cleared caches, internet/data on or off. When it halfway functions it's a decent game, definitely wouldn't spend money on it the way it currently is. Too bad, could be a really good app if it just worked like I think it's supposed to instead of a frozen waste of space.