Ghosts of Darkness

You are being attacked by ghosts in a dark, empty room. Shoot your weapon to see whats around you and take the ghosts out before they reach you. When the ghosts are shot, they leave behind a tombstone. How long can you last before you are overrun by the ghosts? Controls WASD - Movement Space - Press or hold space to shoot Mouse - Move the mouse to aim M - Mute the music