WASD to move, click to shoot, 1 to use the pistol, 2 to use a machine gun, machine gun shoots quicker but is off-target and does 1 damage(takes 1 heart off zombies who have 3 hearts), the pistol does 2 damage at a slower rate and more accurate. You have a score and 3 lives if you love all your lives well, you lose. Orange zombies have 6 lives but move half the speed, green zombies have 3 but move quicker if they touch you, you lose a life. If the timer (top right) is equal to 60 then a load of bosses come and it's scuffed. You move slower while shooting!
Enjoy! Tell me in the comments what I should do to make it better, should I make sound and music. Remix what you want but leave credit, Ted2cool.