Use the keyboard A, W, D, S or arrow keys Left, Up, Right, Down, and mouse button - if the game description "Let's Kill Jeff The Killer - Jeff's Revenge" is not stated otherwise.
Let’s Kill Jeff The Killer – Jeff’s Revenge
Description: Join the crazy battle! Firstly, Choose your side. To be a police to seek for Jeff or to be Jeff to get rid of the cops. Enemies are everywhere, trust no one. Your mission is to kill all the opponents. Enjoy Let's Kill Jeff The Killer - Jeff's Revenge!