s0urce.io is an unusual IO game that concentrates on typing. Rather than attacking other players literally you will have to hack into their computers by typing in several lines of code suggested by the game. It looks cool and ultimately earns you some BT coins that you can spend on data miners to generate even more money.
To hack into another player's server just pick one of the usernames to the left and click 'hack'. Have fun playing s0urce.io!