In Perfect Shot you'll need only your space bar to play. You're in charge of releasing an asteroid from one of the cannons. It will start on the left side of the screen but can move around at higher levels. Then you use the space bar to launch attacks on it to break it up before it hits the earth. This may sound easy, but it's not just one shot you'll need to destroy it. There may be two, three, four, and more shots you need to kill it. You'll have to time your shots through different distances and stages of the asteroid's path. Give Perfect Shot a go and have fun!