Like Agar.io and slither.io, but more intense!
Use WASD and the arrowkeys to move your ninja star and your heart. Put your ninja star in other players' hearts to kill them and get score. If you are doing well, there will be a higher score reward for other players to kill you. Objective zones will sometimes apppear and while you are in one the score you get from each player you kill is multiplied by the current number of players in the zone.