The controls are arrow keys or WSAD for movement, Z/Ctrl is B button X/Space is A button, G is Select/Switch Weapon and Enter is pause. Also it uses a gamepad so if the gamepad is plugged in the keyboard is disabled. The gamepad controls are Joystick/Dpad: Navigate, A: a button and B: b button, Select: switch weapon and Start: pause. To force switch to keyboard if the gamepad is plugged in, press K key.