Your goal is to clear hexagons by finding patterns of colors. A pattern must repeat itself at least twice, and use at least two different colors. For example, a pattern could be Red-Green/Red-Green or Blue-Red-Green-Green/Blue-Red-Green-Green. You can even do a pattern more than two times, if you can find it!
To make a pattern, click and drag across hexagons in the correct order. Then release to clear those hexagons. Try out all three different modes!