Player 1 is the A key. Player 2 is the B key. It will do a countdown, but the DRAW appears after 1 - 10 seconds. It builds up the tension sometimes. ONLY press your shoot button when it says draw, otherwise you'll lose. The game starts back up constantly, so you can keep on adding to your score. So you don't need to press the flag multiple times.
Sorry, but only Player 1 currently has an animation. I'm going to add Player 2's later on.