The higher level you reach, the harder it gets since there are more tubes to arrange colors. HOW TO PLAY: - Control with one finger. - You can only pour if the two tubes have the same color on top and have its own space to hold more water - Keep pouring colored water among the bottle until each bottle hold a watercolor - Don't worry to get stuck, you can always start the level over at any time with a refill and replay the game. FEATURES: - Bright colorful bottles, Control with one finger. - FREE & EASY TO PLAY, hard enough to challenge your brain - Calming and relaxing sound - Multiple unique gameplay with different difficulty levels Enjoy Water Puzzle - Color Sorting now - pouring water never gets such exciting! An awesome game to kill time!