Zombie Skull Seeking Bullet

You are a guy who ran out of food and water in his anti-zombie bunker and decides to face the zombie apocalypse with just one bullet. Luckily, it's not a regular bullet - it will orbit around the crosshair and you can kill countless braindeads with it, but it can also kill you if you're not careful.

Use WASD for movement and mouse for guiding the bullet.