Drag the cups to the tap to fill them, put one cup on top of another to share the water and drag the cups to the well to dump the water out. The first cup can carry 3 litres of water and the second can carry 5. Try to get 2 litres of water in any cup, and then try 4. Feel expensive to remix and change the puzzles! I suggest you remix by changing the amount of water that the cups can hold and changing the puzzles. I wanted to do the 2 above things, but didn't have time. Online, it is a bit hard to fill the other cup, so please download for best results.