Big Duck Games LLC’s Flow Free is a game with a simple premise: join the corresponding colors to create a flowing pipe. To win, a player has to cover the whole board and match all the colors. This isn’t as easy as it sounds because the pipes are going to snap if they overlap. The nature of the game makes it challenging and addictive. For a free game, it packs a lot of features. There are three hundred levels at Free Play mode, Jumbo and Classic packs and ten board types.