Collect small circles to grow and upgrade yourself. The white ability circle represents your health while the green circle your speed. Yellow ability circle is for acceleration - press the right mouse button to accelerate. The Black circle is used to attack other players. You can damage other players by either directly hitting them with your black ability circle or by shooting at them. To do this press and hold your left mouse button. The main purpose of blue ability circles is to protect you from others.
There are also some superabilities that appear in the game. Collect them to get temporal or permanent super powers. Some super abilities can be combined while others may cancel each other so pick your abilities wisely! The list of current abilities is presented below. New abilities are coming soon!!!