Press the green flag to start the game. Move left and right by using the arrow keys. Use the space bar to shoot the falling objects. You have 3 lives.
This is the program I created to write a lesson plan for students to create a similar game. The arrows are deleted when they make contact with the stars (as opposed to the other versions that allow them to continue and possibly destroy another falling object). Because you can shoot while moving and shoot almost continuously, it is really hard to lose. Maybe I should add a limit on bullets, that need to be re earned somehow.