right arrow - Move Forward
left arrow - Move Backward
A - Shoot
S - Jump
Its like shoot to kill game where the player can shoot with a laser gun to the zombies that come to hunt the player. You can go either forward or backward while playing the game or you can jump up in order to avoid from getting killed by the zombie.
You can even go and get some additional enhancements like rapid fire or an extra life to enhance your performance.