Used to love this game Now completely broken & apparently unmaintained. Basic refresh bugs, blank play screens, unstable. Unplayable, after I paid money for it.
Hasn't been updated since 2011 Graphics are terrible....they don't even render correctly on my S6 Edge +. Good game but this paid for app is useless to me now.
Broken on samsung devices I want a refund. Game could be fun, but "the black screen issue" makes it frustratingly unplayable. This issue has existed since 2013. Google Play should pull the paid version until it gets fixed.
Great fun If you like the free version, you'll love more of the same. Each difficulty has 100 puzzles!
My absolute favorite I've done 3/4 of the challenges. The difficulty ratings were inconsistent (some of the easy levels were more difficult than some of the hard levels), but the idea is superb. Easy to pick up, difficult to put down.... More puzzles, please!
Incredible The concept is simple, but the challenge is amazingly engrossing. It's fun, easy to learn, and the difficulty ramps up very well. All in all, a wonderful, flawless game.
Fix for rare undo/hint force close bug.