In Shoot 'Em Up, you play a fighter jet that is under attack from all sides. The timer in the bottom right corner shows you how much time you have to get through for the game is over. As soon as you start moving, your plane automatically starts shooting. Use the direction keys on your keyboard to steer him, and try to hit the tanks and planes that are hitting you. You can see how many points you have in the upper left corner, and you can also see how many hearts you have. Once you run out of hearts, you die and the game is over. You will then get ranked on how well you did and how many enemies you took out.