In the game of Contra, you are a martial artist who must stop a group from destroying humanity. To play you will be using your arrow keys and a few letter buttons on your keyboard. The keys will do the following: to move left just press the left arrow key, the same goes for if you wish to move right. To move up or down, press the up or down arrow keys. To fire press the "J" button and to jump press the "k" button. You must get through each level without dying. Before you start your game you are asked if you wish to start with 3 lives or you can change it to start with more.