Night has fallen on an abandoned compound and the ghouls are coming. Survive five nights with only a pump-action shotgun and a torch. The light is dim, so listen and watch for glowing red eyes.
On a computer: click the game to capture the mouse. Move with W A S D, look with the mouse, left mouse button to fire (pellets spread out, so get close for big damage) and R to reload.
On a phone: left thumb to move, right side to look, hold FIRE (aim is nudged towards close ghouls) and tap RELOAD.
Ghouls drop orange shell boxes and green health cubes. Shells are limited, so make every shot count. You get a few spare shells at the start of every night.