5 stars: This is a very relaxing game; never punishingly difficult, but definitely makes you feel smart when you finally figure out a puzzle. A great one to pick up when you need some time to kill The ads are both at the top of the screen and after every 10 levels, and the pop-ups aren't even that long. They do have sound, though I have no complaints with it; all around a great experience!
4 stars: Update: figured out how to get rid of a created line by accident. It needs to be in the tutorial, because it is not something that comes intuitively. Old review: There is no option to go back a move/several moves, if that function gets added then this game would be a lot more fun. Now you have to restart from the beginning and that is super annoying.
4 stars: Fum simple puzzle game that gets harder as levels advance. I finished it more quickly than I thought I would. It'll hook you, in a good way! Currently there are not 64 levels as noted; there are 96! You can get 3 free hints for watching a short ad if you like, so gameplay can be completely free. In-game ads aren't too intrusive. Overall, I'm glad i downloaded and played it.
3 stars: Good game with nice concept and gameplay. Easy to play and quite addicting for time killing. The only annoying part is that, there's no undo or button to delete wrong lines. It's annoying when you only want to correct one mistake but need to redo the whole process. Even if that's what the developer want, so player need to think throughl...