The VG Resource

http://agar.io/

Select a server and have immediate fun (requires steady internet connection)

1- Eat smaller cells
2- Avoid bigger cells
3- Split with spacebar to lunge towards your prey
4- Press W to throw away your mass to get speedier

How do I get the custom faces?

Some names have skins attached to them, like
- Facepunch
- Steam
- Germany
- Mars
 and so on. Use one of them and you'll have a skin.