4 stars: Fun adictive. I stopped playing. I believe you progress when it lets you. There are times when no mater what you not getting through that level. The direction was not random but clearly calculated. No way to get past. Once you pay you get past the level easy. It was too easy. How can you struggle t's fun beware I believe it's rigged on some of the levels.
5 stars: This is one of the most entertaining games I've played. I've been playing it for a year and a half and I am now keeping up with new levels. I am reading reviews that are saying the only way the game can be played is by spending money, and that is so not true. I've never spent a penny on it (much to the regret of creators :)) and I don't have problems passing levels. Top marks :)!!!
3 stars: The game is quite entertaining, a real time waster. Unfortunately, like so many other mobile games after you get so far the game is rigged to make you lose quite often to encourage you to purchase microtransactions. In one level I started off boxed into a corner and wasn't given a way to even break out until after half of my moves were used. The game isn't random as they claim. Shameful tactics.
3 stars: it's alright, and a decent way to pass the time. although it does get rather infuriating at times. it seems that a lot of the puzzles (especially higher you go) are designed with nowhere near enough moves to complete unless you get certain powerups and all the pieces fall perfectly in line. which that defeats...