ONO: Brain Fog

Experience a fresh and unique puzzle game with O-NO! Test your cognitive skills and challenge yourself to clear all the O's from the screen by starting a chain reaction. This addictive cause and effect puzzle game will put your brain to the test and strengthen your ability in predictive modeling, pattern recognition, working memory, clarity, focus, and attention. With 24 levels ranging from easy to hard, you can master each level by solving six puzzles. The first three puzzles allow you three tries, while the next two give you two tries. The final puzzle must be solved in a single try. Once you master a level, it is open for free play with three tries forever. Need some help? Watch an optional :30 ad to receive 2X points and improve your score. What sets O-NO apart is its endless combinations of puzzles. Larger levels have thousands of variations, so you'll never get bored playing the same patterns. Try O-NO today and put your cognitive skills to the test!