4 stars: It's a good game, but after about level 10, it shows an ad after every level. The levels are easy enough, the amount of time spent solving them isn't long enough to warrant that frequency of ads. It makes me not want to play.
5 stars: UPDATE: STARTED WORKING again at level 3669! I have reached level 3659 now but had major problems. 1) button for adding an extra tube not working AND button for adding different color in another tube had STOPPED. WEIRD and annoying! This same problem happened in range 2600's!
5 stars: I really like this game. One thing I do recommend you do is that you add a color blind feature for people who are colorblind
4 stars: Love puzzles that keep you thinking a little to easy but should get harder as you get further along
5 stars: So far this was what I was expecting. Just problem solving with no time or attempt restraints. Love that. If that changes I will let you know.
3 stars: LOTS of ads, I just simply turn off my Wi-Fi and the game is great.
5 stars: I like this game but challenge stops, 9 colors to 12 colors and then same over and over, don't you have more difficult levels ?
4 stars: Keeps you occupied especially on long car drives and stuff like that but eventually it gets boring because you're doing the same thing every time but overall a pretty good game
4 stars: Fun game, sometimes a bit too easy! I like playing it and I don't need wifi! The ads bother me sometimes though but I just turn on airplane mod...