4 stars: Pretty fun. Lots of easy puzzles, and quite a few challenging ones, too. My only complaint is that there're no accessibility options for color-blind folks. A lot of the shades used in the game look pretty similar.
5 stars: I applaud the conceptors of this game. This is the first totally free app since games hit the mobile phones. And so relaxing. I remember when the kids were young and hyper, the only way you calm them was strip to their underwear, take them outside and put them in a wash bowl full of water with some cups plastic bottles. They keep pouring in and out. One hour later they were ready for a nap.
5 stars: I don't like the themes after the latest update, colors are hard to distinguish, and the backgound color, you have 4 which includes black, and when you select it, it doesn't show, what gives???? If it ain't broke, it doesn't need fixing!!! For pete sake Already moved to my uninstall folder.
3 stars: Fun concept, feels satisfying filling up the tubes but the difficulty ramp up is waaay too slow. After 50 levels it is still way too easy, I don't think I have the patience to plow through over 100 levels before the game gets interesting
4 stars: Awesome Game! Though, Sometimes, I (having some degree of red-green color blindness) struggle to differentiate between close colors, would you consider adding a setting (turned off by default) to add black numbers on top of the same colors? In this case, I promise to give you guys 5 stars instead of ...