About slither.io
From the developer's description on Google Play.
Play against other people online! Can you become the longest slither?
If your head touches another player, you will explode and then it's game over. But if others run into YOU, then THEY will explode, and you can eat their remains!
In slither.io, you have a chance to win even if you're tiny. You can swerve in front of a much larger player to defeat them, no matter how big you are!
Download now and start slithering! Good luck!