In Blitz you play as a fighter bomber. Your mission is to destroy as many buildings as you possibly can. To start your game, press the space bar to pick a level to begin on. Don't forget to also choose the speed at which you wish to play. There are three different speeds to choose which ever you are comfortable with. As your plan goes across the screen, press the space bar to drop bombs onto the buildings. You can't just press the space bar quickly though, there is a waiting time in between bombs so be mindful of when and where you press the space bar.