figure - shows fleet that has been partially shot down figure - we can shoot aliensmaking larger bullets for testing you can test many features of the game simply by running the gamebut some features are tedious to test in the normal version of game for exampleit' lot of work to shoot down every alien on the screen multiple times to test if your code responds to an empty fleet correctly to test particular featuresyou can change certain game settings to focus on particular area for exampleyou might shrink the screen so there are fewer aliens to shoot down or increase the bullet speed and give yourself lots of bullets at once my favorite change for testing alien invasion is to use superwide bullets that remain active even after they've hit an alien (see figure - try setting bullet_width to to see how quickly you can shoot down the fleetchanges like these will help you test the game more efficiently and possibly spark ideas for giving players bonus powers (just remember to restore the settings to normal once you're finished testing feature aliens