On level 15, you can have all squares on the same color, with the allowed number of moves and still fail because, I guess, the game expect you to end the level with another color. What I did was orange > pink, pink> green, green > blue, blue > yellow, but the "official" answer is green > yellow > blue
This game was great, the puzzles were very well thought, and the need to go after resources for the answers outside the game was so cool. I never thought I would be needing to use google to help me find the answer to the puzzles without looking for a walkthrough. Congrats in a job well done StudioCime.
IMO, the new UI is horrible, that may work well on phones, but I'm in my computer. Also, we could see what the achievements did for us before getting them now they are just question marks, I don't like it. Guess is time to just look for another game.