Chuck Norris Retirement day

View the source on Github. The games idea is simple. Alien invaders came to destroy the humankind but there he is Chuck Norris appearing as the last hope of all. Playing as Chuck you have to kill all aliens and prevent them from removing the mankind off the Earth. CONTROLS: MOVEMENT: WASD or Arrow keysSHOOTING: LEFT MOUSE BUTTONWEAPON CHANGE: keys 1, 2 and 3 (the upper/top ones) - `1` is a pistol, `2` is shotgun, `3` is a machine gun