To start, enter a name for your cell, (you don't have to use anything in particular) Move your mouse in the direction you want your cell to move, and try to eat up the little dots. The bigger you get, the slower you move! :) There is a mini-map so you can see where you are in the map. You can't split or eject mass yet, just eat stuff. if you touch the green blobs (Virus) you will lose 5 mass per second. They appear once in a while on the screen. No splitting! So collect as much mass as you can. Feel free to let me know of any glitches/solutions to glitches/suggestions in the comments!
Here is just a simple version of Agar.io. It is NOT cloud multiplayer however, and I DON'T plan to add cloud multiplayer to this.