Having only one visible color and to change one at a time was very good. I had to always worry about the scenery. Whenever it distracts me I die for some hidden color. I don't know if other players had this problem but after it caught the color pink, in one of the new sections that is revealed at the beginning of the game, the block made a sudden movement that didn't realize and went to the red thorns. But the rest of the scenario had no problems. Great job!