Using WASD, you can control the Monster. Using the Arrow Keys and the Mouse, you can control the Human. If the Monster hits the Human, it wins. If the Human shoots the Monster, he wins. If you click on "Settings" on the top left, you will get, who would have expected it?, Settings.
The Background is by "RememberNovember". The other textures are from Google. The Code is by me. IMPORTANT: If it laggs when you try to shoot, its best just to hold the shootbutton.