The way of playing
There will be some beakers or test tubes to be exact, your task is
to put liquids of the same color together! You can transfer
different colored water from one glass to another only if the
other glass is empty or if the top layer of water is the same
color as the glass from which the water will be taken. The glass
you selected will be highlighted to prevent confusion. The restart
button will take you back to the beginning of the level, and also
every time you unlock the same level, the water will be mixed.
Check out the real game.
Water sort puzzle.