This is a match-three game, which means that you need to switch places of adjacent balls to try and form groups of 3 or more adjacent identical pieces lying on the same line. In this case your playing board is a spider web and instead of having common columns and raws you have circles and radius lines. Some of the balls have letters on them. To pass a level you need to eliminate all balls with letters including them in the same color groups.

http://www.offuhuge.com/media/197990/Rainbow_Web_flash_game/

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