Each level of this abstract puzzler challenges you to set up a network of pipes to allow an unspecified substance known as 'flooz' to flow through as many of those as possible. The pieces are offered in random order, and their are seven different types - straight lines going horizontally or vertically, corners rotating in each of the four directions, and cross-over pieces which carry the flooz straight across horizontally or vertically. Each of these can be entered from either side. When the flooz hits a gap, or a piece which the previous piece can't flow into, the pipe is finished.Before the flooz starts flowing from its randomly-selected starting position, you have several seconds to start placing pieces. You can put them down anywhere, so you will often end up in a situation where a long and complex piping arrangement has been set up, but still has a gap waiting to be filled. If you wish to replace a piece with another in the same square (to make it easier to flow the flooz that way), you can do this, but for a slight scoring penalty.Bonuses are awarded for looping the flooz through both sides of at least 5 cross-over pieces, or passing the flooz through every square on the screen. Later levels have some squares on the grid blocked off, a few gaps in the side-wall (allowing you to thread the flooz to the other side of the screen). After every four levels there is a bonus game for points, in which you can only place the pieces in the lowest open space in each column, similarly to Connect 4.