You have a 30 seconds countdown head start to arrange the tiles on the grid so the water can flow directly through to the highlighted area in the bottom right.
You will score a point for each tile you place in the grid.
You will lose a point if you have to place a tile over a tile.
After the 30 seconds are up, the water will flow, and you will score a point for every square it passes through.
If the water can no longer pass it is game over.
Guide the water from the top-left start square to the highlighted finish square in the bottom-right. Cross tiles can be used horizontally and vertically. If the water passes through the same cross tile twice in different directions, you earn a 10 point bonus.
Be careful of the 4 box tile queue. If this overflows then it is game over.
Reach the finish square to win and earn a 25 point bonus.