Start as a lonely small white dot.
Within seconds you become bombarded by dots of all sizes, out to get you. If a dot is smaller than you, then you will absorb them, gaining points. Watch out for the bigger dots though, they will destroy you and end the round.
After death, head to the shop to upgrade to try and do better next time. Later on upgrade to a new shape entirely with unique upgrades.
With 100+ hours of challenging gameplay, you'll soon be addicted and fully engrossed in the world of Orb Absorb.