A smartphone game about supplying water to a gator's pipes so that he can take a shower should not be this addictive, but gamers should know never to underestimate plumbers by now.

In Where's My Water?, you'll use the touch screen to carve dirt out of the way and allow the water to realistically flow down. It seems like a good physics-based puzzler, but it gets more and more challenging as new features get added. You'll face hazards such as algae that grows when water touches it and can block your path, poisonous purple water that contaminates the water, or toxic waste that will erode the dirt.

There are hundreds of levels and they've been smartly releasing free updates to the game. One of the best games you can download to your phone.

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