Paper.io 2

The basic idea behind Paper.io 2 seems to be really simple. Use your character, which in this case is a small dot, and try to cover and complete as much ground as possible. The goal is to get the entire map, but there are other players around.
 
Of course, there are some limitations. For example, you can die if someone intercepts your line before completing the line. And some of the other players are more interested in catching other lines than completing their own.