Agario is a fun addicting MMO game in which you have to eat or be eaten while you strive to dominate the World of colorful cells. The game has just 2 simple rules to follow: 1) you only can consume targets that are smaller than you and you should match their color to evolve yourself, 2) you must give larger objects a wide berth or you will die. Start moving through the grid and try to catch all the tiny blurs of color. Eat and grow, split and multiply and rule the world.
As Always, Good Luck and Have Fun.