Waternet is an ingenious game where you have pipes and pipes of different shapes and sizes that you must connect to each other to get water to run through them.
There are, in Waternet, three modalities to play: one, with rows and columns that move; another, with individual pieces to move; and a third that combines both modalities at the same time. In total, there are 20 static levels to solve, but combining them can be converted to 180.
Of course, some levels are more difficult than others. Although Waternet is totally free, the authors request a small financial donation if you end up liking the game.
You can free download Waternet 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.