flOw

This game is really beautiful and meditative, developed by two guys of the University of Southern California. Eat and evolve. Guide your microorganism through the proverbial slime by having it follow your mouse. Klicking will give it a swimming boost in that direction.
Consume whatever organisms you encounter but beware of the bigger ones who might try to do the same to you. You can nib at them as well as long as you go for the brighter circular cells in their body. If you eat an organism with a blue dot you move up towards the surface one level, while the ones with a red dot will bring you down. Cells with a + will make yor body segments evolve. Enough said, go have a snack.