5 stars: I absolutely love this game, it's challenging but fun, and there's more to it than just switching around colors until you get it right. I find this perfect, maybe there could be a feature where you can look at the puzzle after you complete it? (Also, it's really nice how you can buy hints with coins instead of just watching ads, but still there's an ad every other level)
4 stars: This is the best game of this type. No annoying animations, no unnecessary items, and the levels are challenging. I would appreciate having access to previous levels though. The one thing that is actually a problem for me is that if you minimize the app in the middle of the level or if you close the app after you finish but before you click next, it makes you redo the whole level.
4 stars: It's a great game, and I love it! Even better is it's playable offline and that tends to help me a ton whenever I don't have access to good Wi-Fi, really helps me pass time or calm down. But I'm on level 69 and I open the game and it's glitched so I only see a part of the puzzle and can't actually do anything... I love the game and really hope this can be fixed because it's otherwise fine.
2 stars: It was fun, but then I hit the unsolvable level #95. Tried several times, and there is always a piece that doesn't fit into the pattern. I made several screenshots, from the start of the level, where they show you how the solved puzzle looks like, and from my attempts, and - ta-da - there's a piece m...