Snowball.io
The most addictive game with the simplest control ever.
Make a snowball bigger and bump it to opponents to flick them off the play field.
You can make one giant snowball or a number of small balls... and you can bump it directly to the opponent or snipe them with it... it is totally up to you.

How to control: swipe to the direction you want to move, and lift your finger to shoot the snowball.