I love this game. I don't know why this format is so appealing. This game, in particular, is just right, starting from their privacy policy, which is simple, readable and humane. The options are simple, the skins and tails are charming—you just have to tap Home to get to them. My favorites are the 3D skins, which have cool shapes, including animal cubes, barrel shapes inc. pencils, and interlocking brick toy. These 3Ds have shadows!No, it's not perfect, but rounding makes it five stars. The ads are also humane. They're mostly short. Paying for a free game by watching ads is a fair exchange, but I hate ads that waste my time and patience, so I love the quality here. There are also opportunities to watch more ads to get game stuff, but they're optional. My first game like this was really good but then that company started dropping ads and game tokens all over, interrupting play. In this game, every so often, a cube turns into a golden cube which you tap for game cash and opportunities for more with ads, but you can choose when to tap them, so they're not too annoying. The cubes don't line up, especially in larger puzzles, and some skins make it hard to tell, but there are generous amount of extra moves to cover mistakes.Most of the puzzles are unlimited. There's a daily timed puzzle, but you can get extra time for an ad or game cash. Every so often, there's a challenge level where you're only allowed five mistakes, but you can retry if you fail.All in all, it's a really good game