You have to maneuver different liquids with different environments, 50 levels, but with great graphics. Is really geacht lovingly. By turning the imaginary horizon is influenced direction and speed and so tries to get ahead without major losses of liquids that react quite differently.
Small puzzles added and you can learn a great deal from the field of physics and chemistry. Especially the garden level like it very much. The whole thing does not work as hectic as many other games that I've seen so at acquaintances.
Nice touches are also included, a CD with the soundtrack of the game nice and of course the free Steam key and a postcard also there at that.
The 'Puddle' makes me non gamers much joy, I make every now and then a level one, it relaxes and loosens long working hours pleasant on.
For the price you wanted makes you nothing wrong, and my grandchildren were already off and have completed some level after a short time.
From me, then a buy recommendation and like 5 star *****.