You are going to start by choosing between the single player and multiplayer modes. With the arrows you move, and with the space bar you shoot, when you have ammunition available. You need to avoid all the planets, rocks, and other items falling from the top, but grab the power-ups, ammunition, and other helpful items, since they will help you. The more time you survive, and the more things you shoot down, the more points you will get, and we are sure that you want a really big score! Good luck, and stay with us, if you want to play even more awesome games!